BC Racing for BMW 3 Series E46 (1999-2005)

BC Racing BR Series Coilover Suspension Kit - BMW E46 M3

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:555853

Part#: I-14-BR

In Stock

$ 1,195.00 USD

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$ 1,195.00 USD

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Looking for coilovers that will provide reliability on street driven vehicles but are also capable of feeding your weekend track demon's desire for performance? BC Racing's BR Series coilover kit may be just the thing for you.

BR Series coilovers are the most popular and versatile option offered by BC racing, offering features such as 30-level dampening adjustment (simultaneous compression and rebound control), linear springs where possible, and a minimum of 2 inches ride height drop. To ensure performance, comfort, and quality, all BR Series kits are Dyno tested during the design stage to determine the best valving and spring rates, then installed and tested for a minimum of 6 months. This kit features mounts and brackets that are fully compatible with all stock mounting points and components.

The upper shock/strut mounts are all constructed of 6061-T6 Aluminum for strength and weight savings. BC Racing design 1 of 3 types of upper mounts for each vehicle: Caster/Camber Plates (+/- 3* camber), Camber Plates (+/- 3* camber), and Rubber Mount Plates (NVH reduction). The included mount option for this kit is shown in the kit specs and features below.

Lower shock mounts are powder coated for corrosion protection and constructed of either 6061-T6 aluminum that has been milled from a single piece (fork or bolt eye mount) or of STKM13C steel with all brackets welded robotically.

The included springs come in one of 3 styles: linear, S-barrel, and V-barrel. Linear springs are used in most applications unless limited by the OE design that does not allow the use of linear springs. All spring options are made from SAE9254 steel and have a zinc coating applied under the powder coating for increased spring corrosion protection and long term reliability.

All shock bodies used in the BR Series coilovers use a 53mm shock body (unless noted otherwise) for added strength, performance, and increased fluid capacity. All shocks are then powder coated black chrome for clean styling and corrosion protection.

Specs and Features:

8k Front & 12k Rear Spring Rate
Linear front & S-Barrel rear springs
Valved specifically to spring style and rate
Camber Plate Front Mounts
Aluminum and Rubber Rear Mounts
Black Powder Coated Components
All OE style brackets and mounting for perfect fit
30 Levels of Simultaneous Compression and Rebound Dampening
2 inch minimum and 3+ Inches of total potential drop
Great for Track, Street, and any other conditions

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BC Racing Rear Damping Adjustment Extenders - BR Type

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:555864

Part#: DMP-EXT

Ships in 3 Business Days

$ 34.99 USD

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$ 34.99 USD

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The rear damping adjuster on coilovers is usually hidden under a bunch of hard to reach interior panels requiring you to remove carpet, panels and sometimes even the rear seat back in order to adjust the dampening on your BC rear coilovers. The BC Racing rear extender adjuster allow you to make these adjustments without removing the rear interior. Simple make two small holes in the interior above the adjuster and the extension can be passed through the interior panels. Now the adjustments can be performed from above.

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BC Racing BR Series Coilover Suspension Kit - E46 Non-M RWD

For coupe and sedan models only

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:555863

Part#: I-02-BR

In Stock

$ 1,195.00 USD

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Qty

$ 1,195.00 USD

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Looking for coilovers that will provide reliability on street driven vehicles but are also capable of feeding your weekend track demon's desire for performance? BC Racing's BR Series coilover kit may be just the thing for you.

BR Series coilovers are the most popular and versatile option offered by BC racing, offering features such as 30-level dampening adjustment (simultaneous compression and rebound control), linear springs where possible, and a minimum of 2 inches ride height drop. To ensure performance, comfort, and quality, all BR Series kits are Dyno tested during the design stage to determine the best valving and spring rates, then installed and tested for a minimum of 6 months. This kit features mounts and brackets that are fully compatible with all stock mounting points and components.

The upper shock/strut mounts are all constructed of 6061-T6 Aluminum for strength and weight savings. BC Racing design 1 of 3 types of upper mounts for each vehicle: Caster/Camber Plates (+/- 3* camber), Camber Plates (+/- 3* camber), and Rubber Mount Plates (NVH reduction). The included mount option for this kit is shown in the kit specs and features below.

Lower shock mounts are powder coated for corrosion protection and constructed of either 6061-T6 aluminum that has been milled from a single piece (fork or bolt eye mount) or of STKM13C steel with all brackets welded robotically.

The included springs come in one of 3 styles: linear, S-barrel, and V-barrel. Linear springs are used in most applications unless limited by the OE design that does not allow the use of linear springs. All spring options are made from SAE9254 steel and have a zinc coating applied under the powder coating for increased spring corrosion protection and long term reliability.

All shock bodies used in the BR Series coilovers use a 53mm shock body (unless noted otherwise) for added strength, performance, and increased fluid capacity. All shocks are then powder coated black chrome for clean styling and corrosion protection.

Specs and Features:

8k Front & 12k Rear Spring Rate
Linear front & S-Barrel rear springs
Valved specifically to spring style and rate
Camber Plate Front Mounts
Aluminum and Rubber Rear Mounts
Black Powder Coated Components
All OE style brackets and mounting for perfect fit
30 Levels of Simultaneous Compression and Rebound Dampening
2 inch minimum and 3+ Inches of total potential drop
Great for Track, Street, and any other conditions

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BC Racing DS Series Coilover Suspension Kit - BMW E46 M3

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:598270

Part#: I-14-DS

In Stock

$ 1,395.00 USD

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$ 1,395.00 USD

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The DS series from BC racing offers increased control and feedback for those looking to achieve the best driving experience possible. Digressive Valving means the shock is firmer at low speed, while transitioning to a softer and more linear feel as (shaft) speed increases. This leads to a much more planted and controlled feeling in the chassis, increased feedback through the wheel, and a slight drop in passenger comfort.

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BC Racing BR Series Extreme Low Coilovers - E46 Non-M RWD

For coupe and sedan models only

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:568113

Part#: I-02E-BR

Ships on Jul 27, 2026

$ 1,345.00 USD

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$ 1,345.00 USD

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Looking for coilovers that will provide reliability on street driven vehicles but are also capable of feeding your weekend track demon's desire for performance? BC Racing's BR Series coilover kit may be just the thing for you. BR Series coilovers are the most popular and versatile option offered by BC racing, offering features such as 30-level dampening adjustment (simultaneous compression and rebound control), linear springs where possible, and a minimum of 2 inches ride height drop, up to 5". To ensure performance, comfort, and quality, all BR Series kits are Dyno tested during the design stage to determine the best valving and spring rates, then installed and tested for a minimum of 6 months. This kit features mounts and brackets that are fully compatible with all stock mounting points and components. The upper shock/strut mounts are all constructed of 6061-T6 Aluminum for strength and weight savings. BC Racing design 1 of 3 types of upper mounts for each vehicle: Caster/Camber Plates (+/- 3* camber), Camber Plates (+/- 3* camber), and Rubber Mount Plates (NVH reduction). The included mount option for this kit is shown in the kit specs and features below. Lower shock mounts are powder coated for corrosion protection and constructed of either 6061-T6 aluminum that has been milled from a single piece (fork or bolt eye mount) or of STKM13C steel with all brackets welded robotically. The included springs come in one of 3 styles: linear, S-barrel, and V-barrel. Linear springs are used in most applications unless limited by the OE design that does not allow the use of linear springs. All spring options are made from SAE9254 steel and have a zinc coating applied under the powder coating for increased spring corrosion protection and long term reliability. All shock bodies used in the BR Series coilovers use a 53mm shock body (unless noted otherwise) for added strength, performance, and increased fluid capacity. All shocks are then powder coated black chrome for clean styling and corrosion protection. Specs and Features: 6k Front & 12k Rear Spring Rate V-Barrel front & Linear rear springs Valved specifically to spring style and rate Camber Plate Front Mounts Aluminum and Rubber Front Mounts Black Powder Coated Components All OE style brackets and mounting for perfect fit 30 Levels of Simultaneous Compression and Rebound Dampening Extreme Drop version allows additional 1-1.5" lowering over the standard 2-4" lowering from traditional BR suspension kits Shocks are 1" shorter in length and springs are specifically selected for greater lowering capabilities Great for Track, Street, and any other conditions

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BC Racing DS Series Coilover Suspension Kit - E46 Non-M RWD

For coupe and sedan models only

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:598256

Part#: I-02-DS

Ships in 5 Business Days

$ 1,395.00 USD

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$ 1,395.00 USD

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The DS series from BC racing offers increased control and feedback for those looking to achieve the best driving experience possible. Digressive Valving means the shock is firmer at low speed, while transitioning to a softer and more linear feel as (shaft) speed increases. This leads to a much more planted and controlled feeling in the chassis, increased feedback through the wheel, and a slight drop in passenger comfort. Swift Springs are available upon request with your choice of rates and matched or custom valving.

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BC Racing BR Series Extreme Low Coilovers - BMW E46 M3

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:568104

Part#: I-14E-BR

Ships on Jul 27, 2026

$ 1,345.00 USD

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Qty

$ 1,345.00 USD

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Looking for coilovers that will provide reliability on street driven vehicles but are also capable of feeding your weekend track demon's desire for performance? BC Racing's BR Series coilover kit may be just the thing for you. BR Series coilovers are the most popular and versatile option offered by BC racing, offering features such as 30-level dampening adjustment (simultaneous compression and rebound control), linear springs where possible, and a minimum of 2 inches ride height drop, up to 5". To ensure performance, comfort, and quality, all BR Series kits are Dyno tested during the design stage to determine the best valving and spring rates, then installed and tested for a minimum of 6 months. This kit features mounts and brackets that are fully compatible with all stock mounting points and components. The upper shock/strut mounts are all constructed of 6061-T6 Aluminum for strength and weight savings. BC Racing design 1 of 3 types of upper mounts for each vehicle: Caster/Camber Plates (+/- 3* camber), Camber Plates (+/- 3* camber), and Rubber Mount Plates (NVH reduction). The included mount option for this kit is shown in the kit specs and features below. Lower shock mounts are powder coated for corrosion protection and constructed of either 6061-T6 aluminum that has been milled from a single piece (fork or bolt eye mount) or of STKM13C steel with all brackets welded robotically. The included springs come in one of 3 styles: linear, S-barrel, and V-barrel. Linear springs are used in most applications unless limited by the OE design that does not allow the use of linear springs. All spring options are made from SAE9254 steel and have a zinc coating applied under the powder coating for increased spring corrosion protection and long term reliability. All shock bodies used in the BR Series coilovers use a 53mm shock body (unless noted otherwise) for added strength, performance, and increased fluid capacity. All shocks are then powder coated black chrome for clean styling and corrosion protection. Specs and Features: 6k Front & 12k Rear Spring Rate V-Barrel front & Linear rear springs Valved specifically to spring style and rate Camber Plate Front Mounts Aluminum and Rubber Front Mounts Black Powder Coated Components All OE style brackets and mounting for perfect fit 30 Levels of Simultaneous Compression and Rebound Dampening Extreme Drop version allows additional 1-1.5" lowering over the standard 2-4" lowering from traditional BR suspension kits Shocks are 1" shorter in length and springs are specifically selected for greater lowering capabilities Great for Track, Street, and any other conditions

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BC Racing BR Series Coilover Suspension Kit - BMW E46 Convertible ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:36710092

Part#: I-90-BR

Ships in 6 Business Days

$ 1,195.00 USD

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$ 1,195.00 USD

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The BC Racing BR Series offers the most affordable entry into coilover suspension without sacrificing performance, comfort, build quality, vehicle height, or handling. This is done by extensively testing each vehicle then refining the coilover characteristics as many times as needed to ensure the most well-balanced and affordable aftermarket suspension conceivable. BC Racing takes great pride in choosing spring rates for our off-the-shelf kits that strike the perfect balance between comfort and performance so you're never stuck with an oversprung suspension like many other brands sell. BC Racing offers one of the widest ranges of damping adjustment with 30-clicks of compression/rebound adjusted simultaneously on the BR Series. With meticulously chosen spring rates, damper valving, and one of the widest adjustment ranges in the industry, you can't go wrong with the BC Racing BR Series Coilover System.

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BC Racing RM Series Coilover Suspension Kit - On-Center Front Mounts ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:4319909

Part#: I-14-RM

Back Ordered

$ 1,495.00 USD

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$ 1,495.00 USD

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BC Racing has made a name for themselves in the automotive enthusiast communities by developing adjustable, street-and-track capable coilover kits for over a decade that are not only extremely effective, but also don't brake the bank! The BC Racing RM Series Coilover System uses a mono-tube inverted damper in the front and rear of vehicles that use McPherson style OEM strut suspension. On vehicles that use front struts only, BC Racing provides an inverted front strut and then provides an upright BR Series damper for the rear. Inverted dampers are useful in decreasing unsprung weight by moving the greatest mass of the strut to the top where it connects to the sprung weight of the chassis, where weight can be more easily shaved. The RM series feature high quality damping adjustable monotube inverted dampers at the front or front and rear, depending on vehicle. The RM coilovers offer the majority of the features of the BR series but with the additional benefit of the inverted damper unit. Inverting the damper unit brings with it a number of advantages. The large 42mm damper rod and inverted design gives the inverted damper units much greater strength and resistance to side loadings. By reducing flex the RM inverted units lead to more consistent steering geometry resulting in more predictable and responsive handling. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminum components (top mounts, locking collars etc.) are anodized and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc.) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: Highly Customizable Inverted Mono-Tube Damper Linear Piston And Damping Curve Height Adjustment Independent Of Spring Compression 30-Clicks Of Simultaneous Compression/Rebound Adjustment Front Camber Plates Standard On Applicable Kits Rear Camber Plates Available For Applicable Kits Custom Spring Rates And Swift Spring Compatible Custom Valving Or Valving Paired For Custom Spring Rates 1-Year Warranty Against Manufacturers Defect Fully Rebuildable NOTE: LEAD TIMES WILL BE 4-8 WEEKS.

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BR Series BMW Coilover Suspension Kit With Swift Springs Upgrade - BC...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:567343

Part#: I-02-BR-SW

Ships on Jul 27, 2026

$ 1,665.00 USD

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$ 1,665.00 USD

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BC Racing BR Series Coilover Suspension Kit - E46 M3 Convertible ...

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T#:36777918

Part#: I-121-BR

Ships in 6 Business Days

4% off MSRP $ 1,245.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 1,195.00 USD

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4% off MSRP

$ 1,245.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 1,195.00 USD

Add to Wish List

The BC Racing BR Series offers the most affordable entry into coilover suspension without sacrificing performance, comfort, build quality, vehicle height, or handling. This is done by extensively testing each vehicle then refining the coilover characteristics as many times as needed to ensure the most well-balanced and affordable aftermarket suspension conceivable. BC Racing takes great pride in choosing spring rates for our off-the-shelf kits that strike the perfect balance between comfort and performance so you're never stuck with an oversprung suspension like many other brands sell. BC Racing offers one of the widest ranges of damping adjustment with 30-clicks of compression/rebound adjusted simultaneously on the BR Series. With meticulously chosen spring rates, damper valving, and one of the widest adjustment ranges in the industry, you can't go wrong with the BC Racing BR Series Coilover System.

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BC Racing BR Series Coilover Suspension Kit - Extreme Low - BMW E46 C...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:36710093

Part#: I-90E-BR

Ships on Jul 27, 2026

$ 1,345.00 USD

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Qty

$ 1,345.00 USD

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BR Series coilovers are the most popular and versatile option offered by BC racing, offering features such as 30-level dampening adjustment (simultaneous compression and rebound control), linear springs where possible, and a minimum of 2 inches ride height drop. To ensure performance, comfort, and quality, all BR Series kits are Dyno tested during the design stage to determine the best valving and spring rates, then installed and tested for a minimum of 6 months. This kit features mounts and brackets that are fully compatible with all stock mounting points and components.

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BC Racing DS Series Extreme Low Coilovers - E46 Non-M RWD

For coupe and sedan models only

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:25009234

Part#: I-02E-DS

Ships on Jul 27, 2026

$ 1,545.00 USD

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$ 1,545.00 USD

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The DS Series Coilovers use a proprietary digressive piston design that offers the driver increased damping force at low-speed piston velocities while maintaining a linear damper feel at higher piston velocities. One of the greatest advantages of increased low-speed damping force relates to what the driver feels, e.g., roll, pitch, dive, and quick weight transitions on technical road courses. You will notice a much more planted and confident chassis feel, with increased feedback through the steering wheel. To evoke the passion for driving that all automotive enthusiasts have embedded in their DNA, BC Racing took the best features from Their BR Series Coilover, engineered components to improve driver experience, conducted in-house testing, approved the product, determined a reasonable, affordable price, and proudly present the BC Racing DS Series Coilover for 350+ vehicles, from the Toyota Camry to the Nissan GT-R and beyond, BC Racing has a DS Series Coilover system for you. The DS Series is available for a vast number of vehicles and with that, an equal number of customization options as well. The BC Racing DS Series Coilover can be customized for every type of racing imaginable, from the weekend track warrior to the full-time race car.

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BC Racing DS Series Coilover Suspension Kit - Off Center Top Plates -...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:49892348

Part#: I-14-DS-OFFC

Ships on Jul 27, 2026

$ 1,565.00 USD

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$ 1,565.00 USD

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BC Racing's new proprietary digressive piston design offers increased damping force at low piston velocities while maintaining a linear damper feel at higher piston velocities. One of the greatest advantages of increased low-speed damping force relates to what the driver feels, e.g., roll, pitch, dive, and quick weight transitions on technical road courses. For The Ultimate In Driver Feel - Choose BC Racing DS Series Coilovers.

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BC Racing BR Series Coilover Suspension Kit - W/ Swift Springs - E46 ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:53361585

Part#: I-121-BR-SW

Ships on Jul 27, 2026

$ 1,765.00 USD

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Qty

$ 1,765.00 USD

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The BC Racing BR Series offers the most affordable entry into coilover suspension without sacrificing performance, comfort, build quality, vehicle height, or handling. This is done by extensively testing each vehicle then refining the coilover characteristics as many times as needed to ensure the most well-balanced and affordable aftermarket suspension conceivable. BC Racing takes great pride in choosing spring rates for our off-the-shelf kits that strike the perfect balance between comfort and performance so you're never stuck with an oversprung suspension like many other brands sell. BC Racing offers one of the widest ranges of damping adjustment with 30-clicks of compression/rebound adjusted simultaneously on the BR Series. With meticulously chosen spring rates, damper valving, and one of the widest adjustment ranges in the industry, you can't go wrong with the BC Racing BR Series Coilover System.

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BC Racing RM Series Coilover Suspension Kit - E46 Non-M RWD

For coupe and sedan models only

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:4319898

Part#: I-02-RM

Back Ordered

$ 1,495.00 USD

Add to Wish List

Qty

$ 1,495.00 USD

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BC Racing has made a name for themselves in the automotive enthusiast communities by developing adjustable, street-and-track capable coilover kits for over a decade that are not only extremely effective, but also don't brake the bank! The BC Racing RM Series Coilover System uses a mono-tube inverted damper in the front and rear of vehicles that use McPherson style OEM strut suspension. On vehicles that use front struts only, BC Racing provides an inverted front strut and then provides an upright BR Series damper for the rear. Inverted dampers are useful in decreasing unsprung weight by moving the greatest mass of the strut to the top where it connects to the sprung weight of the chassis, where weight can be more easily shaved. The RM series feature high quality damping adjustable monotube inverted dampers at the front or front and rear, depending on vehicle. The RM coilovers offer the majority of the features of the BR series but with the additional benefit of the inverted damper unit. Inverting the damper unit brings with it a number of advantages. The large 42mm damper rod and inverted design gives the inverted damper units much greater strength and resistance to side loadings. By reducing flex the RM inverted units lead to more consistent steering geometry resulting in more predictable and responsive handling. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminum components (top mounts, locking collars etc.) are anodized and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc.) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: Highly Customizable Inverted Mono-Tube Damper Linear Piston And Damping Curve Height Adjustment Independent Of Spring Compression 30-Clicks Of Simultaneous Compression/Rebound Adjustment Front Camber Plates Standard On Applicable Kits Rear Camber Plates Available For Applicable Kits Custom Spring Rates And Swift Spring Compatible Custom Valving Or Valving Paired For Custom Spring Rates 1-Year Warranty Against Manufacturers Defect Fully Rebuildable NOTE: LEAD TIMES WILL BE 4-8 WEEKS.

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BR Racing ZR Series Coilover Suspension Kit - E46 Non-M RWD

For coupe and sedan models only

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:4333512

Part#: I-02-ZR

Back Ordered

$ 2,835.00 USD

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$ 2,835.00 USD

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BC Racing's new ZR Series Coilovers bring a 3-way adjustable track ready coilover system to racers from novice to pro for a price not seen before in the performance suspension market. Each ZR Series Coilover system offers independent low speed and high speed compression adjustment and separate rebound adjustment. They also offer full height adjustability independent of piston travel and spring preload. On cars with McPherson struts the ZR Series comes standard with an inverted monotube damper with the steel braided Teflon coated line exiting the top of the damper to the external reservoirs that can be remotely mounted in the engine bay or boot. The ZR Series kits offer 30 clicks of rebound adjustment, 15 clicks of low speed compression adjustment, and 12 clicks of high speed compression. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminum components (top mounts, locking collars etc.) are anodized and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc.) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: * 3-way adjustable damping controls * External reservoir * Engineered for 100% track use * Inverted damper design. (depending on models) * Dual Piston design. (1 in res., 1 in shock) * Teflon coated steel braided lines for external reservoir on inverted dampers and solid stem for double A-arm cars * Custom spring rates available * Completely rebuildable * Monotube damper design * Patented concave lower locking collar * 1 year manufacturer warranty

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BC Racing ER Series Coilover Suspension Kit - E46 Non-M RWD

For coupe and sedan models only

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:4333542

Part#: I-02-ER

Back Ordered

$ 1,935.00 USD

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$ 1,935.00 USD

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The ER Series coilovers bring with them the high quality and unique features seen on the BR and RM type but have the additional benefit of external reservoirs and the ability to allow the end user to individually adjust and set compression and rebound damping rates. By separating the adjustment for damping compression and rebound the ER Series allows you to dial the vehicle in to your exact needs. When braking hard whilst approaching a corner you want the car to transfer weight to the front tires to maximize grip for the braking effort and also to allow you to trail brake into the corner without the car understeering. Ride height adjustment: Ride height is determined by the position of the coil over bottom mount. The mount can be wound up and down the damper body to give a full range of adjustment. Because ride height is determined by an adjustable bottom mount rather than spring platform you retain full damper travel regardless of the ride height run. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminium components (top mounts, locking collars etc) are anodised and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: Highly Customizable Mono-Tube Damper Linear Twin-Piston Design Height Adjustment Independent Of Spring Compression 30-Clicks Of Compression Adjustment Via The External Reservoirs 30-Clicks Of Rebound Adjustment From The Top Of The Damper Front And Rear Camber Plates Standard On All Applicable Kits Front And Rear Pillowball Mounts Standard When Camber Plates Do Not Apply Custom Spring Rates And Swift Spring Compatible Custom Valved To Match The Drivers Requested Spring Rates Swift Spring Upgrade Available On Most Applications 1-Year Warranty Against Manufacturers Defect Fully Rebuildable NOTE: LEAD TIMES ON ALL NEW ORDERS 4-8 WEEKS

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BC Racing ZR Series Coilover Suspension Kit - Off-Center Front Mounts...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:4333520

Part#: I-14-ZR-O

Back Ordered

$ 2,835.00 USD

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$ 2,835.00 USD

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BC Racing's new ZR Series Coilovers bring a 3-way adjustable track ready coilover system to racers from novice to pro for a price not seen before in the performance suspension market. Each ZR Series Coilover system offers independent low speed and high speed compression adjustment and separate rebound adjustment. They also offer full height adjustability independent of piston travel and spring preload. On cars with McPherson struts the ZR Series comes standard with an inverted monotube damper with the steel braided Teflon coated line exiting the top of the damper to the external reservoirs that can be remotely mounted in the engine bay or boot. The ZR Series kits offer 30 clicks of rebound adjustment, 15 clicks of low speed compression adjustment, and 12 clicks of high speed compression. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminum components (top mounts, locking collars etc.) are anodized and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc.) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: * 3-way adjustable damping controls * External reservoir * Engineered for 100% track use * Inverted damper design. (depending on models) * Dual Piston design. (1 in res., 1 in shock) * Teflon coated steel braided lines for external reservoir on inverted dampers and solid stem for double A-arm cars * Custom spring rates available * Completely rebuildable * Monotube damper design * Patented concave lower locking collar * 1 year manufacturer warranty

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BC Racing ER Series Coilover Suspension Kit - Off-Center Front Mounts...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:4333551

Part#: I-14-ER-O

Back Ordered

$ 1,935.00 USD

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$ 1,935.00 USD

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The ER Series coilovers bring with them the high quality and unique features seen on the BR and RM type but have the additional benefit of external reservoirs and the ability to allow the end user to individually adjust and set compression and rebound damping rates. By separating the adjustment for damping compression and rebound the ER Series allows you to dial the vehicle in to your exact needs. When braking hard whilst approaching a corner you want the car to transfer weight to the front tires to maximize grip for the braking effort and also to allow you to trail brake into the corner without the car understeering. Ride height adjustment: Ride height is determined by the position of the coil over bottom mount. The mount can be wound up and down the damper body to give a full range of adjustment. Because ride height is determined by an adjustable bottom mount rather than spring platform you retain full damper travel regardless of the ride height run. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminium components (top mounts, locking collars etc) are anodised and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: Highly Customizable Mono-Tube Damper Linear Twin-Piston Design Height Adjustment Independent Of Spring Compression 30-Clicks Of Compression Adjustment Via The External Reservoirs 30-Clicks Of Rebound Adjustment From The Top Of The Damper Front And Rear Camber Plates Standard On All Applicable Kits Front And Rear Pillowball Mounts Standard When Camber Plates Do Not Apply Custom Spring Rates And Swift Spring Compatible Custom Valved To Match The Drivers Requested Spring Rates Swift Spring Upgrade Available On Most Applications 1-Year Warranty Against Manufacturers Defect Fully Rebuildable NOTE: LEAD TIMES ON ALL NEW ORDERS 4-8 WEEKS

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BC Racing RM Series Coilover Suspension Kit - Off-Center Front Mounts...

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T#:4333503

Part#: I-14-RM-O

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$ 1,495.00 USD

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$ 1,495.00 USD

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BC Racing has made a name for themselves in the automotive enthusiast communities by developing adjustable, street-and-track capable coilover kits for over a decade that are not only extremely effective, but also don't brake the bank! The BC Racing RM Series Coilover System uses a mono-tube inverted damper in the front and rear of vehicles that use McPherson style OEM strut suspension. On vehicles that use front struts only, BC Racing provides an inverted front strut and then provides an upright BR Series damper for the rear. Inverted dampers are useful in decreasing unsprung weight by moving the greatest mass of the strut to the top where it connects to the sprung weight of the chassis, where weight can be more easily shaved. The RM series feature high quality damping adjustable monotube inverted dampers at the front or front and rear, depending on vehicle. The RM coilovers offer the majority of the features of the BR series but with the additional benefit of the inverted damper unit. Inverting the damper unit brings with it a number of advantages. The large 42mm damper rod and inverted design gives the inverted damper units much greater strength and resistance to side loadings. By reducing flex the RM inverted units lead to more consistent steering geometry resulting in more predictable and responsive handling. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminum components (top mounts, locking collars etc.) are anodized and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc.) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: Highly Customizable Inverted Mono-Tube Damper Linear Piston And Damping Curve Height Adjustment Independent Of Spring Compression 30-Clicks Of Simultaneous Compression/Rebound Adjustment Front Camber Plates Standard On Applicable Kits Rear Camber Plates Available For Applicable Kits Custom Spring Rates And Swift Spring Compatible Custom Valving Or Valving Paired For Custom Spring Rates 1-Year Warranty Against Manufacturers Defect Fully Rebuildable NOTE: LEAD TIMES WILL BE 4-8 WEEKS.

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BC Racing ZR Series Coilover Suspension Kit - On-Center Front Mounts ...

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T#:4333519

Part#: I-14-ZR-C

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$ 2,835.00 USD

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$ 2,835.00 USD

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BC Racing's new ZR Series Coilovers bring a 3-way adjustable track ready coilover system to racers from novice to pro for a price not seen before in the performance suspension market. Each ZR Series Coilover system offers independent low speed and high speed compression adjustment and separate rebound adjustment. They also offer full height adjustability independent of piston travel and spring preload. On cars with McPherson struts the ZR Series comes standard with an inverted monotube damper with the steel braided Teflon coated line exiting the top of the damper to the external reservoirs that can be remotely mounted in the engine bay or boot. The ZR Series kits offer 30 clicks of rebound adjustment, 15 clicks of low speed compression adjustment, and 12 clicks of high speed compression. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminum components (top mounts, locking collars etc.) are anodized and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc.) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: * 3-way adjustable damping controls * External reservoir * Engineered for 100% track use * Inverted damper design. (depending on models) * Dual Piston design. (1 in res., 1 in shock) * Teflon coated steel braided lines for external reservoir on inverted dampers and solid stem for double A-arm cars * Custom spring rates available * Completely rebuildable * Monotube damper design * Patented concave lower locking collar * 1 year manufacturer warranty

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BC Racing ER Series Coilover Suspension Kit - On-Center Front Mounts ...

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T#:4333550

Part#: I-14-ER-C

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$ 1,935.00 USD

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$ 1,935.00 USD

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The ER Series coilovers bring with them the high quality and unique features seen on the BR and RM type but have the additional benefit of external reservoirs and the ability to allow the end user to individually adjust and set compression and rebound damping rates. By separating the adjustment for damping compression and rebound the ER Series allows you to dial the vehicle in to your exact needs. When braking hard whilst approaching a corner you want the car to transfer weight to the front tires to maximize grip for the braking effort and also to allow you to trail brake into the corner without the car understeering. Ride height adjustment: Ride height is determined by the position of the coil over bottom mount. The mount can be wound up and down the damper body to give a full range of adjustment. Because ride height is determined by an adjustable bottom mount rather than spring platform you retain full damper travel regardless of the ride height run. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminium components (top mounts, locking collars etc) are anodised and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: Highly Customizable Mono-Tube Damper Linear Twin-Piston Design Height Adjustment Independent Of Spring Compression 30-Clicks Of Compression Adjustment Via The External Reservoirs 30-Clicks Of Rebound Adjustment From The Top Of The Damper Front And Rear Camber Plates Standard On All Applicable Kits Front And Rear Pillowball Mounts Standard When Camber Plates Do Not Apply Custom Spring Rates And Swift Spring Compatible Custom Valved To Match The Drivers Requested Spring Rates Swift Spring Upgrade Available On Most Applications 1-Year Warranty Against Manufacturers Defect Fully Rebuildable NOTE: LEAD TIMES ON ALL NEW ORDERS 4-8 WEEKS

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E46 HM Series Coilover Suspension Kit

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T#:4319923

Part#: I-02-HM

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$ 2,535.00 USD

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$ 2,535.00 USD

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BC Racing's HM Coilover system offers the same great benefits of the RM Series with the addition of 2 way damping adjustment. Each HM Coilover system features inverted mono-tube dampers with independently adjustable compression and rebound. The inverted damper design moves vital damper fluid away from detrimental heat sources to avoid overheating which can cause damper fade under extreme track use. Know your safe from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminum components (top mounts, locking collars etc.) are anodized and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc.) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: Engineered for 100% track use * 30 levels of separate rebound and compression adjustment * Inverted damper design (depending on models) * Dual Piston design (1 res., 1 in shock) * Teflon coated steel braided lines for external reservoir on inverted dampers and solid stem for double A-arm cars Custom spring rates available * Completely rebuildable * Monotube damper design * Patented concave lower locking collar * 1 year manufacturer warranty NOTE: LEAD TIMES FOR ALL NEW ORDERS ARE 4-8 WEEKS.

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ZX Series Coilover Suspension Kit - E46 Convertible

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T#:51320859

Part#: I-90-ZX

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$ 2,565.00 USD

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$ 2,565.00 USD

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For the E46 Convertible enthusiast looking to bridge the gap between a high-end street car and a dedicated race machine, the BC Racing ZX Series offers an unparalleled engineering approach. By moving the compression valving to the external canisters, the system maintains its integrity under high-stress, high-temperature conditions, effectively eliminating "damper fade." For the E46 Convertible—which lacks the structural rigidity of its coupe counterparts—the ZX Series' advanced damping provides the stability needed to maintain a flat cornering attitude. The system features bearing-mounted spring platforms to eliminate "spring binding" or popping during tight maneuvers. Fully rebuildable and customizable, the ZX Series is a long-term investment in the competitive potential of your BMW. Key Features: Enhanced Thermal Management: External canisters keep fluid away from brake heat, maintaining valving accuracy lap after lap. Camber Adjustable Top Mounts: High-quality aluminum plates eliminate factory rubber "mush," providing direct, unmediated steering feedback. Independent Ride Height: Threaded bottom mounts allow for ride height changes without sacrificing suspension travel or preload. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme track vibration. Custom Valving Available: Each kit can be custom-valved to match specific driver preferences or extreme aero/tire setups. Specifications: Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (Excludes M3 models). Spring Rates (Default): Front: 6 kg/mm | Rear: 10 kg/mm (Swift Springs standard). Spring Type: Genuine Swift Springs for reduced unsprung weight. Piston Design: Linear Twin-Piston with remote canister valving. Warranty: 2-Year limited manufacturer's warranty.

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BC Racing HM Series Coilover Suspension Kit - E46 M3 Convertible ...

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T#:51355994

Part#: I-121-HM

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$ 2,565.00 USD

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$ 2,565.00 USD

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For the E46 M3 Convertible owner who demands uncompromised geometry control, the BC Racing HM Series offers a motorsport-first engineering solution. By utilizing an inverted strut layout with a much larger internal piston shaft, the HM Series excels in maintaining wheel alignment during extreme lateral cornering—a critical factor for the MacPherson strut-equipped M3. The addition of external reservoirs ensures the damping fluid remains cool, preserving valving accuracy lap after lap. Standard front pillowball camber plates eliminate factory rubber "mush," providing direct and unmediated steering feedback. Because convertibles often require higher roll stiffness to compensate for chassis flex, the HM Series’ 12kg rear spring rate provides the stability needed to keep the car planted and responsive. Key Features: Enhanced Side-Load Resistance: The inverted design handles high lateral loads longer than traditional upright dampers without fatigue. Reduced Damper Fade: External canisters move fluid away from brake heat to maintain consistent lap times. Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for surgical alignment and increased turn-in bite. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked even under track conditions. Fully Rebuildable: All components are individual and replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW M3 Convertible (E46 Chassis). Spring Rates (Standard): Front: 8 kg/mm | Rear: 12 kg/mm (Swift Springs). Hardware: Black chrome-plated steel shock bodies and 6061-T6 aluminum components. Adjustment Type: Independent ride height, spring preload, and 2-way damping. Warranty: 1-Year limited manufacturer's warranty.

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BC Racing ZR Series Coilover Suspension Kit - E46 M3 Convertible ...

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T#:51356002

Part#: I-121-ZR

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$ 2,865.00 USD

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$ 2,865.00 USD

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For the professional-level racer or the extreme enthusiast, the BC Racing ZR Series addresses the unique geometric and thermal requirements of the E46 M3 platform. By utilizing inverted front struts with a massive 42mm piston shaft, the ZR Series provides extreme structural rigidity, preventing geometry deflection under heavy braking and cornering loads. The 3-way adjustment allows the driver to "dial in" the car for specific obstacles; for instance, softening high-speed compression to soak up aggressive curbing while keeping low-speed compression firm for immediate turn-in response. Combined with standard pillowball top mounts, this system eliminates the "mushy" feel of factory rubber, providing direct, unmediated feedback to the driver. Key Features: Reduced Damper Fade: Remote external canisters move fluid away from hot brake components to ensure consistent lap times. Camber Adjustable Top Mounts: High-quality aluminum plates allow for aggressive track alignments to maximize the tire contact patch. Pillowball Rear Mounts: Replaces rubber bushings with solid spherical bearings for increased response and precision. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme track vibration. Fully Rebuildable: Every component is individual and replaceable, making this a long-term investment in the car's competitive potential Specifications: Vehicle Fitment: 2000–2006 BMW M3 (E46) Convertible / Coupe. Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm. Construction: TIG-welded steel and CNC-machined aluminum. Adjustment Range: 3-Way Independent (Rebound / Low-Speed Compression / High-Speed Compression). Warranty: 1-Year manufacturer’s warranty against defects.

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BC Racing HM Series Coilover Suspension Kit - E46 Convertible ...

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T#:51320856

Part#: I-90-HM

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$ 2,565.00 USD

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$ 2,565.00 USD

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For the E46 Convertible owner looking to overcome the platform's inherent chassis flex and maximize track performance, the BC Racing HM Series offers a motorsport-first engineering approach. By utilizing an inverted strut layout and a high 12kg rear spring rate, the HM Series provides uncompromised geometry control under heavy cornering loads. The 2-way independent adjustment allows the driver to fine-tune high-speed stability and low-speed turn-in separately, which is critical for balancing a convertible's unique weight distribution. Every HM Series kit is hand-assembled with TIG-welded 304 stainless steel and 6061-T6 aluminum components, ensuring a system that is as durable as it is fast. Key Features: Enhanced Thermal Stability: External canisters move the fluid away from brake heat to maintain valving accuracy. Linear Twin-Piston Design: Provides a large surface area for precise and predictable damping response. Camber Adjustable Top Mounts: Precision-engineered aluminum plates eliminate factory rubber compliance for direct steering feedback. Independent Ride Height: Threaded shock bodies allow for height adjustment without sacrificing damper stroke or spring travel. Fully Rebuildable: All components are individual and replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (Excludes M3). Spring Rates (Default): Front: 6 kg/mm | Rear: 12 kg/mm. Piston Design: Linear Twin-Piston. Construction: 304 Stainless Steel and Anodized 6061-T6 Aluminum. Warranty: 2-Year limited manufacturer's warranty.

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RM Series Coilover Suspension Kit - E46 Convertible

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T#:51320850

Part#: I-90-RM

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$ 1,515.00 USD

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$ 1,515.00 USD

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For the E46 Convertible enthusiast who demands uncompromised feedback, the BC Racing RM Series offers a professional-grade solution. By moving the oil reservoir away from the wheel hub and brake components, the RM Series manages heat more effectively, preventing "damper fade" during long track sessions. The inclusion of front pillowball camber plates eliminates the compliant factory rubber bushings, providing direct and unmediated steering feel. Because convertibles often suffer from chassis flex, the RM Series' ability to maintain a flat cornering attitude through its stiff 12kg rear spring rate and robust inverted front struts makes it a transformative upgrade for the E46 platform. Key Features: Enhanced Thermal Management: Inverted layout moves fluid away from brake heat to maintain consistent damping performance. Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for aggressive alignment specs to maximize front-end grip. Patented Concave Locking Ring: Unique design ensures that once ride height is set, the lower mounts remain locked securely. TIG-Welded Durability: High-strength steel shock bodies with a black chrome finish for maximum corrosion resistance. Fully Rebuildable: Every component is individual and replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (Excludes M3). Spring Rates (Default): Front: 6 kg/mm | Rear: 12 kg/mm. Damping Curve: Linear. Construction: Heavy-duty steel and 6061-T6 aluminum. Warranty: 2-Year limited warranty against manufacturer's defects.

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BC Racing ER Series Coilover Suspension Kit - E46 M3 Convertible ...

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T#:51355992

Part#: I-121-ER

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$ 1,955.00 USD

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$ 1,955.00 USD

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For the E46 M3 enthusiast looking to bridge the gap between a high-end street car and a dedicated race machine, the BC Racing ER Series offers a "motorsport-first" engineering approach. By moving the secondary damping piston to the external canister, the system maintains its integrity under high-stress conditions. This is especially beneficial for the M3 Convertible, where the high 12kg rear spring rate helps counteract the platform's inherent weight and chassis flex, providing a flat and predictable cornering attitude. The system includes front pillowball camber plates as standard, eliminating the compliant factory rubber bushings to provide direct, unmediated steering feedback and allowing for aggressive track-ready alignment settings. Key Features: Reduced Damping Fade: External canisters keep fluid cooler by increasing the distance from hot brake components. Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for surgical alignment and increased turn-in bite. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme vibration. Linear Piston Architecture: Provides a predictable and consistent damping feel for better driver confidence at the limit. Serviceable Construction: All components are individual and fully replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW M3 (E46) Convertible / Coupe. Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm. Spring Type: High-strength SAE9254 cold-wound steel. Construction: Black chrome-plated steel bodies for maximum corrosion resistance and anodized 6061-T6 aluminum. Warranty: 1-Year limited manufacturer's warranty.

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ER Series Coilover Suspension Kit - E46 Convertible

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T#:51320855

Part#: I-90-ER

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$ 1,955.00 USD

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$ 1,955.00 USD

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For the E46 Convertible enthusiast looking to bridge the gap between a high-end street car and a dedicated race machine, the BC Racing ER Series offers uncompromised performance. By moving the secondary damping piston to the external canister, the system maintains its integrity under high-stress, high-temperature conditions. This is especially beneficial for the E46 Convertible, where the added 12kg rear spring rate helps counteract the platform's inherent weight distribution and chassis flex. The system features bearing-mounted spring platforms to eliminate the friction and "spring binding" often felt during tight steering maneuvers. Every ER Series kit is hand-assembled with precision and is fully rebuildable, ensuring it remains a long-term investment in the performance of your BMW. Key Features: Reduced Damping Fade: Strategic fluid placement keeps oil cooler, preserving valving accuracy during extended spirited driving. Camber Adjustable Top Mounts: High-quality aluminum plates eliminate the "mushy" feel of factory rubber bushings for direct driver feedback. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme vibration. Customization Ready: Fully compatible with Swift Spring upgrades and custom valving tailored to specific tire or aero setups. Serviceable Construction: All components are individual and fully replaceable directly through BC Racing North America. Specifications: Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (Excludes M3). Spring Rates (Default): Front: 6 kg/mm | Rear: 12 kg/mm. Spring Type: High-strength SAE9254 cold-wound steel. Construction: 304 Stainless Steel and 6061-T6 Anodized Aluminum. Warranty: 2-Year limited manufacturer's warranty.

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BC Racing DS Series Coilover Suspension Kit - G30 AWD

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T#:51355985

Part#: I-131-DS

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$ 1,415.00 USD

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$ 1,415.00 USD

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For the BMW G30 owner looking to eliminate the "wallow" of factory suspension, the BC Racing DS Series offers a professional-grade motorsport approach. Built from TIG-welded 304 stainless steel and heavy-duty aluminum, this system is designed to withstand the rigors of high-intensity driving. The DS Series includes high-strength SAE9254 cold-wound steel springs, which have been tested through over 500,000 cycles with less than 5% deformation. By moving the secondary damping piston to the digressive valving architecture, the system provides a sharper turn-in and more direct steering feedback. Every DS Series kit is hand-assembled and fully rebuildable, ensuring it remains a long-term performance investment for your BMW. Key Features: Enhanced Chassis Poise: Digressive damping curve specifically combats the weight of the G30 chassis during spirited driving. Pillowball Top Mounts: High-quality aluminum alloy mounts provide direct feedback and eliminate factory rubber compliance. Patented Locking Ring: Features a concave lower locking ring that prevents the system from vibrating loose even under track conditions. Bearing-Mounted Spring Platforms: Minimizes "spring binding" or popping during low-speed steering maneuvers. Customization Ready: Fully compatible with custom spring rates and Swift Spring upgrades for tailored track setups. Specifications: Vehicle Fitment: 2017–2023 BMW 5-Series (G30) Sedan AWD / xDrive. Spring Rates (Default): Front: 9 kg/mm | Rear: 4.2 kg/mm. Adjustability: Independent ride height, independent spring preload, and 30-way damping. Maintenance: Fully rebuildable with all replacement parts readily available. Warranty: 1-Year limited manufacturer's warranty.

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BC Racing DS Series Coilover Suspension Kit - E46 Convertible ...

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T#:51320846

Part#: I-90-DS

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$ 1,415.00 USD

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$ 1,415.00 USD

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The BC Racing DS Series for the E46 Convertible is built using motorsport-grade materials designed to withstand the rigors of spirited driving and technical road courses. Because the E46 platform benefits greatly from increased front camber, this kit comes standard with front pillowball camber plates. These plates replace the compliant factory rubber mounts, providing unmediated feedback to the driver and allowing for aggressive alignment settings to maximize tire contact patches. Every DS Series kit is fully rebuildable and customizable, with the option to upgrade to Swift Springs for even more consistent spring rates and reduced weight. Whether you're carving canyons or attending a weekend track day, the DS Series provides the stability and feedback needed to push the E46 chassis to its limits. Key Features: Front Camber Plates: Precision-engineered aluminum plates for surgical alignment and increased turn-in bite. Satin Chrome Finished Shock Body: A highly durable coating that resists the elements while providing a high-end look. Linear Spring Piston: While the valving is digressive, the springs remain linear to provide a predictable and consistent feel. Fully Rebuildable: Every part, from the seals to the valving, is serviceable and replaceable. Custom Spring Rate Compatibility: Can be ordered with custom valving paired specifically to your requested spring rates. Specifications: Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (All models except M3). Spring Rates (Default): Front: 6 kg/mm | Rear: 8 kg/mm. Optional Rates: Custom rates available (e.g., 8kg/10kg) for more track-oriented setups. Piston Diameter: 46mm. Adjustability: Ride height, spring preload, and 30-way damping.

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BC Racing ZR Series Coilover Suspension Kit - E46 Convertible ...

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T#:51320857

Part#: I-90-ZR

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$ 2,865.00 USD

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$ 2,865.00 USD

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Designed for racers ranging from novice to pro, the BC Racing ZR Series addresses the unique weight distribution and chassis requirements of the E46 Convertible. The inverted front struts utilize a massive 42mm piston shaft, providing a rigid backbone that prevents geometry deflection under heavy braking and high-G cornering. By separating low-speed and high-speed compression, drivers can stiffen low-speed damping to eliminate body roll and pitch during turn-in while keeping high-speed damping compliant enough to absorb track curbing without upsetting the chassis. Every ZR kit is hand-assembled with TIG-welded steel and anodized 6061-T6 aluminum, providing a professional-grade motorsport component that is fully rebuildable and customizable. Key Features: Enhanced Low-Speed Damping: Specifically tuned to stabilize the E46’s heavier convertible chassis during quick weight transitions. Thermal Management: Remote-mounted external reservoirs move fluid away from hot brake components to ensure consistent lap times. Camber Adjustable Top Mounts: High-quality aluminum plates eliminate factory rubber "mush," providing direct, unmediated steering feedback. Bearing-Mounted Spring Platforms: Minimizes friction between the spring and perch to eliminate "spring binding" during tight steering. Industrial Corrosion Protection: Black chrome-plated steel shock bodies and electrophoretic disposition on steel mounts ensure a long service life. Specifications: Vehicle Fitment: 2000–2006 BMW 3-Series (E46) Convertible (All models except M3). Spring Rates (Standard): Front: 6 kg/mm | Rear: 10 kg/mm (Swift Springs). Piston Design: Linear Twin-Piston (Standard on 3-way kits). Weight: Approx. 23 kg (Full Kit). Warranty: 2-Year limited manufacturer's warranty.

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BC Racing ZX Series Coilover Suspension Kit - E46 M3 Convertible ...

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T#:51356016

Part#: I-121-ZX

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$ 2,595.00 USD

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$ 2,595.00 USD

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For the E46 M3 Convertible enthusiast looking to bridge the gap between a high-end street car and a dedicated race machine, the BC Racing ZX Series offers an unparalleled engineering approach. By moving the compression valving to the external canisters, the system maintains its integrity under high-stress, high-temperature conditions, effectively eliminating "damper fade." For the E46 M3 platform—especially the convertible which requires higher roll stiffness to compensate for chassis flex—the ZX Series' 12kg rear spring rate and advanced damping provide the stability needed to maintain a flat cornering attitude. The system features standard front pillowball camber plates to eliminate factory rubber "mush," providing direct and unmediated steering feedback to the driver. Key Features: Enhanced Thermal Management: External canisters keep fluid away from brake heat to maintain valving accuracy lap after lap. Camber Adjustable Top Mounts: High-quality aluminum alloy plates allow for aggressive track alignments to maximize the tire contact patch. Pillowball Rear Mounts: Replaces rubber bushings with solid spherical bearings (on applicable kits) for increased response and precision. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme track vibration. Fully Rebuildable: Every component is individual and replaceable, making this a long-term investment in the car's competitive potential. Specifications: Vehicle Fitment: 2000–2006 BMW M3 Convertible (E46 Chassis). Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm (Swift Springs standard). Piston Design: Linear Twin-Piston with remote canister valving. Adjustment Range: 3-Way Independent (Rebound / Low-Speed Compression / High-Speed Compression). Warranty: 1-Year limited manufacturer's warranty.

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BC Racing DS Series Coilover Suspension Kit - E46 M3 Convertible ...

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T#:51355987

Part#: I-121-DS

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$ 1,415.00 USD

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$ 1,415.00 USD

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The BC Racing DS Series for the E46 M3 Convertible is built using motorsport-grade materials designed to withstand the rigors of spirited driving and technical road courses. Because the E46 M3 platform benefits greatly from increased front camber, this kit comes standard with front pillowball camber plates. These plates replace the compliant factory rubber mounts, providing unmediated feedback to the driver and allowing for aggressive alignment settings to maximize tire contact patches. Every DS Series kit is hand-assembled and fully rebuildable, with the option to upgrade to Swift Springs for even more consistent spring rates and reduced weight. Whether you're carving canyons or attending a weekend track day, the DS Series provides the stability and feedback needed to push the E46 M3 chassis to its limits. Key Features: Front Camber Plates: Precision-engineered aluminum alloy plates for surgical alignment and increased turn-in bite. Patented Locking Ring: Features a concave lower locking ring that prevents the system from vibrating loose even under track conditions. Bearing-Mounted Spring Platforms: Minimizes "spring binding" or popping during low-speed steering maneuvers. Fully Rebuildable: Every component, from the seals to the valving, is individual and replaceable for long-term serviceability. Customization Ready: Fully compatible with custom spring rates and Swift Spring upgrades for tailored track setups. Specifications: Vehicle Fitment: 2000–2006 BMW M3 Convertible (E46 Chassis). Spring Rates (Default): Front: 7 kg/mm | Rear: 12 kg/mm. Spring Type: High-strength SAE9254 cold-wound steel. Adjustability: Independent ride height, independent spring preload, and 30-way damping. Warranty: 2-Year limited manufacturer's warranty.

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BC Racing RM Series Coilover Suspension Kit - E46 M3 Convertible ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:51355989

Part#: I-121-RM

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$ 1,515.00 USD

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$ 1,515.00 USD

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For the E46 M3 Convertible owner who demands uncompromised feedback during spirited driving or track sessions, the BC Racing RM Series offers a professional-grade motorsport approach. By moving the fluid reservoir away from the wheel hub and brake components, the RM Series manages heat more effectively, preventing damper fade during prolonged high-speed sessions. The inclusion of front pillowball camber plates replaces compliant factory rubber bushings, providing direct and unmediated steering feel. Because convertibles often require higher roll stiffness to compensate for chassis flex, the RM Series' default 12kg rear spring rate provides the stability needed to keep the E46 M3 planted and responsive through tight technical sections. Key Features: Reduced Damper Fade: Inverted layout keeps oil temperature more stable by increasing distance from hot brake components. Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for aggressive alignment specs to maximize front-end grip. Patented Concave Locking Ring: Unique design ensures that once ride height is set, the lower mounts remain locked securely against vibration. Linear Piston Architecture: Provides a predictable and consistent damping feel for better driver confidence at the limit. Fully Rebuildable: Every component is individual and replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW M3 (E46) Convertible / Coupe. Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm. Optional Upgrades: Compatible with custom spring rates and Swift Springs (+2kg/-2kg range on standard valving). Finish: Black chrome-plated steel bodies for maximum corrosion resistance. Warranty: 2-Year limited warranty against manufacturer's defects.

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