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

For coupe and sedan models only

T#:4333512

Part#: I-02-ZR

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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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ST Suspensions Lowering Spring Set - BMW E46

For convertible models only For touring models only

T#:373581

Part#: 65281

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$ 449.00 USD

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$ 449.00 USD

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Optimizes chassis dynamics by limiting weight transfer and body roll.

ST XTA Plus 3 Coilover Kit - E46 Non-M RWD

T#:638035

Part#: 1820220821

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$ 2,799.00 USD

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$ 2,799.00 USD

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After the success of ST's XTA line of coilovers, it's no wonder ST decided to take things a step further with their all-new XTA Plus 3 coilovers. These new coilovers take many of the great features of the XTA line and integrated them in a package with significantly more control, allowing you to individually adjust 3 dampening settings, including High-Speed Compression, Low-Speed Compression, and Rebound dampening. This makes dialing in your preferred tack settings a breeze and allows for fine-tuned adjustment to suit any track conditions and racing styles! As an added bonus, this means even major vehicle modifications (such as heavy roll cages, bushing changes, altered wheel loads) can be taken into account when adjusting your coilovers to help you further maintain similar optimal handling characteristics. Features: Latest damping technology for maximum longevity Reduced system friction for effective damping adjustment Individual lowering within the tested adjustment range Front and rear axle (when possible) with thread adjustment Galvanized coilover struts with additional coating for an optimized corrosion protection Complete solution with adjustable spring plate, race spring system, and bumpers with dust protection Aluminum adjustable uniball top mounts (when possible) Scaled camber adjustment (when possible) 3-way adjustable dampers: 18 clicks low-speed rebound damping 24 clicks low-speed compression damping 24 clicks high-speed compression damping Lowering Specifications: Front: 1.2-2.8" Rear: 1.2-2.0"

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Lowering Spring Set

T#:376308

Part#: 65257

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$ 449.00 USD

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$ 449.00 USD

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ST Sport Springs lower the center of gravity to reduce body roll in corners and limit weight transfer under acceleration. Manufactured to the highest worldwide quality standards, each spring is custom wound from high-tensile steel and rigorously tested and inspected to ensure absolute strength and reliability. Note: For vehicles with sport suspension, lowering height will be less than listed.

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Febi Ball Bearing For Strut Mounting

We Price Match - Give Us A Call or Chat!

T#:16375125

Part#: 31331090612SK

Special Order: No Guaranteed ETA

$ 16.99 USD

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$ 16.99 USD

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These replacements from Febi are the perfect solution for worn mounts/bearings. Because they are factory OE parts, they fit perfectly in the mounting location and are the proper length and have the correct inside diameter for your struts. A small addition to any front suspension overhaul that can make a huge difference in overall ride quality. Priced each, but should always be replaced in pairs. To get the most out of your new suspension setup, it's recommended that you replace all parts that are known to fail. Not only will this make your new setup more effective, it will provide a better ride, proper tire position, and make all of your parts last longer. One often overlooked piece is the upper strut bearing and mount. This is the top mount for your struts and provides a solid platform for your front suspension. If worn, the bearings within this mount make noise, there is slop from worn rubber, and it can shorten the life of your shocks.

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E46 325xi/330xi KW Coilover Kit - Variant 3 (V3)

T#:11636

Part#: 35220024

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$ 3,094.00 USD

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$ 3,094.00 USD

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Adjustable Rebound & Compression Damping

State-of-the-art technology from motor sports for more performance on the road for your E46 3 series. The separate and independently adjustable rebound- and compression damping allows for an individual suspension setup for different uses and preferences. The unique patented system with its two-stage valves allows a rebound damping adjustment (comfort) and a compression adjustment (driving dynamics) in the low-speed range while the high-speed range which controls the driving safety, is fixed.

Individually adjustable rebound and compression

Infinitely variable rebound damping adjustment

14-way adjustable compression damping

Unique, individually working damping force adjustment

Stainless steel technology "inox-line"

Individually height-adjustable - Front - 35-65mm, Rear - 35-65mm

TUV approved lowering range

High-quality component parts for long durability.

This item fits the following BMWs:
2001-2005 E46 BMW 325xi 330xi

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

T#:4333520

Part#: I-14-ZR-O

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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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E46 325xi/330xi KW Coilover Kit - Variant 1 (V1)

T#:11562

Part#: 10220024

Special Order: No Guaranteed ETA

$ 1,924.00 USD

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$ 1,924.00 USD

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Factory Pre-set Damping

The Variant 1 is KW's basic simple and effective coil over kit that is still packed with lots of features -

Pre-set damping optimized for a blend of ride comfort and handling with less bodyroll than the standard suspension,

Stainless steel strut/shock bodies and composite spring perches for superior corrossion resistance,

Individually height-adjustable - Front = 35-65mm lowering; Rear = 35-65mm lowering,

TUV approved lowering range and operation,

Expert engineering and design for ease-of-use and long durability,
This is the ideal coil over kit for an E46 Xi owner who does not plan on tracking or autocrossing the car and just wants a lower, more aggressive stance and better handling. KW has set the shock damping rates to be an excellent balance for a smooth yet taut ride, and to resist bodyroll motions for better handling. The Variant 1 differs from the Street Comfort set in that it has stiffer springs and revised shock settings. If you want a sportier ride and better handling than stock the Variant 1 is an excellent choice.

Fitment Note: Wheel spacers may be required depending on wheel/tire sizing and ride height setting.

This item fits the following BMWs:
2001-2005 E46 BMW 325xi 330xi

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

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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Eibach Pro-Alignment Rear Camber Arm Kit - 98-05 BMW E46

T#:24079615

Part#: EIB5.72110K

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$ 418.00 USD

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$ 418.00 USD

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Installation of aftermarket suspension components like the Eibach Pro-Kit, Sportline spring kit, or Pro-Street coil-over kit can significantly modify a vehicle's ride height and suspension geometry. Following such modifications, wheel alignment becomes a critical consideration. Lowering a vehicle often results in negative camber, where the top of the tire tilts inward toward the center of the vehicle. While some negative camber can improve traction and cornering grip, excessive negative camber can compromise handling and accelerate tire wear. Eibach offers a range of Pro-Alignment kits to address this issue, designed to correct excessive negative camber and restore the vehicle's alignment to factory specifications. These kits not only bring the camber within acceptable limits but also offer additional adjustment options for experienced tuners to fine-tune the alignment for performance-oriented driving. Proper alignment ensures precise turn-in, crisp handling, and enhanced high-speed stability, crucial for performance driving enthusiasts.

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Rein Rear Control Arm Bushing - E36, E46, E83, Z4

2X Entries Into Our F80 M3 Sweepstakes

T#:363435

Part#: 33321092247

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$ 28.99 USD

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$ 28.99 USD

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Upper control arm to subframe bushing

KW Clubsport Coilover Kit - 2-Way Adjustable - E46 M3

T#:348849

Part#: 35220825

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$ 4,744.00 USD

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$ 4,744.00 USD

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Tailored for track performance, the KW Clubsport Coilover Kit offers exceptional adjustability, catering to enthusiasts who desire precise ride quality adjustments according to varying loads, tire setups, and other driving factors.

Product Benefits:

Ideal for track performance
Abundant adjustability options
Precision in ride quality adjustments
Customizable settings for load, tires, and driving conditions
Enhanced handling and responsiveness

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3S Air Management System With P3 Controller

T#:22591957

Part#: 27718

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$ 1,045.00 USD

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$ 1,045.00 USD

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Introducing the Air Lift Performance 3S Air Management Kit

The Air Lift Performance 3S is a groundbreaking air management kit that takes performance to the next level. This kit includes a manifold and a basic wiring harness, providing the flexibility to be installed in conjunction with separately purchased components. It is compatible with both 1/4” and 3/8” air lines, offering various kit versions to cater to different displays and switch boxes or exclusive use with the ALP3 app. Whichever version you choose, seamless integration with the ALP3 app is guaranteed.

Components to be purchased separately include:

Air springs
Water trap
Controllers (e.g., AVS switchbox)
Fittings/air lines
Compressor
Insulated copper wires in 10-, 12-, 18-, and 20-gauge
Tank wire, connectors, terminals, butt splices
Pressure switch fuse/holders
Relay
Schrader valve and blow-off valve

Additionally, there are versions of the 3S kit available with the Air Lift Performance V2 or ALP3 controller or just the smartphone app for added convenience.

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ST XA Performance Coilover System - Height And Rebound Adjustable - E...

T#:599124

Part#: 18220023

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$ 1,399.00 USD

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$ 1,399.00 USD

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Designed in conjunction with KW Germany, ST XA coilovers deliver a sporty handling by reducing the car’s bodyroll during compression as well as improving agility when driving fast. The high-quality production of each ST XA coilover includes a low-friction and pressure resistant housing alongside a chrome-plated piston rod for maximum longevity. A mono block guide and ST seal package ensures the twin-tube dampers remain free of dirt particles in all weather conditions.

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

T#:4333551

Part#: I-14-ER-O

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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

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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RM Series Coilover Suspension Kit - E46 Convertible

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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3-series Strut/Shock Mount Kit - E46 (not M3, not xi)

10X Entries Into Our F80 M3 Sweepstakes

T#:338747

Part#: E46MOUNTKIT

Back Ordered

Sale - Save 5% $ 377.99

This product was last offered at the strikethrough price on
06-25-2026

Starting at $ 357.85 USD

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Sale - Save 5%

$ 377.99

This product was last offered at the strikethrough price on
06-25-2026

Starting at $ 357.85 USD

Add to Wish List

This mount package contains all of the commonly replaced rubber mounts and pads for the front and rear shocks on a 1999-2005 E46 3-series (not for M3 or xi AWD). While you're installing new front struts and rear shocks these are easily installed - there's no additional labor and special tools are not required. Since these pieces are mostly rubber, they dry up and crack over time. Re-using them lead to problems with fitment or noise, and may have safety issues as well. These mounts and pads are the perfect complement to your new shocks to help restore your car's handling and performance.

Pick and choose from mounts below:

Front strut mounts (also known as the guide support)

Front strut reinforcement plates (to prevent cracking and deforming of the front strut towers)

Front and rear self-locking mounting nuts

Rear Lifetime Warranty 'Repair Shop' shock mounts

Rear shock mount reinforcements (to prevent cracking of shock towers)

Rear shock mount gaskets The spring pads, dust boots, and bump stops can be added from the menu below. Note that front bump stops and dust boots are generally not required if you're using Bilstein struts, Bilstein coil overs, H&R coil overs, or KW coil overs. Those struts come with their own front bump stops and boots and may include rear stops and boots as well.

We offer three varieties of the rear shock mounts - OEM, Repair Shop, and HP alum-rubber. We recommend either the Repair Shop or HP mounts because the stock OEM design has a flaw that can lead to premature failure of the mounts. The Repair Shop and HP mounts use a different design that will last longer and the Repair Shop mounts also have a lifetime warranty!

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 328i 328ci 330i 330ci

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ER Series Coilover Suspension Kit - E46 Convertible

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 - E46 Convertible ...

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

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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ZX Series Coilover Suspension Kit - E46 Convertible

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 DS Series Coilover Suspension Kit - G30 AWD

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 HM Series Coilover Suspension Kit - E46 Convertible ...

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

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 ZR Series Coilover Suspension Kit - E46 Convertible ...

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

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

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

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

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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