BMW Suspension Parts for BMW Z4 M Roadster S54 (2003-2008)

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Your BMW's handling is determined by the capabilities and age of your suspension components. Our selected aftermarket performance suspension like coilovers, lowering springs, cup kits, and dampers can improve the handling of your BMW dramatically. With those upgrades comes the needs for proper adjustment; our recommended supporting modifications comes stiffer sway bars, bushings, and adjustable camber/caster plates, to name a few found on this page. Completely build your suspension for the most competitive BMW driving experience, achieve your perfect look, or simply replace your worn suspension with our recommended parts.

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BC Racing - Corporate Logo
T#:555847
Part#: I-22-BR
Back Ordered
$ 1,195.00 USD
Free Shipping
$ 1,195.00 USD
Free Shipping

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:

  • 6k Front & 8k 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 - Corporate Logo
T#:568095
Part#: I-22E-BR
Ships on Oct 22, 2026
$ 1,345.00 USD
Free Shipping
$ 1,345.00 USD
Free Shipping
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 - Corporate Logo
T#:555864
Part#: DMP-EXT
Back Ordered
$ 39.99 USD
Free Shipping on orders $49 and up
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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Front Sway Bar Link - E46, Z4
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:338081
Part#: 31351095694
In Stock
Starting at $ 36.52 USD
Free Shipping on orders $49 and up
Starting at $ 36.52 USD
Free Shipping on orders $49 and up
This is the standard front sway bar / swaybar link for BMW E46 and E85 Z4. It connects the sway bar to the strut. If you hear front end noise when going over bumps while turning we recommend you check these. Alternate BMW Part#31356780847 Sold individually

We also offer an upgraded link from Meyle with heavy duty ball joints for additional durability. See options below.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 328i 328ci 330i 330ci M3 - Sorry not for Xi Models!
2003-2008 Z4 BMW Z4 2.5i Z4 3.0i Z4 3.0si Z4 M Roadster M Coupe
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Complete Rear Upper Shock Mounting Kit
For coupe models only
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:5416757
Part#: 33521092362TMSKT
Ships on Feb 24, 2027
Sale - Save 15% $ 115.99

This product was last offered at the strikethrough price on
05-03-2026

$ 98.18 USD
Free Shipping
Sale - Save 15%
$ 115.99

This product was last offered at the strikethrough price on
05-03-2026

$ 98.18 USD
Free Shipping
Complete rear upper shock mounting kit includes everything you need to replace old, hardened mounts with new heavy duty replacements. Body seals, hardware, and reinforcement plates are included. Kit includes: Heavy-duty, German-made Lemfoerder rear shock mounts from the E46 M3 Elring shock mount gaskets Heavy-duty rear shock mount reinforcement plates Locking nuts Select your vehicle for additional fitment information. **Note** Upper damper nuts vary in size from shock to shock. If you wish to replace them please measure your damper and source accordingly.
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Packaged by Turner - Corporate Logo
T#:638972
Part#: 31336779613KT8
Ships on Feb 24, 2027
Sale - Save 4% $ 285.86

This product was last offered at the strikethrough price on
05-03-2026

$ 275.29 USD
Free Shipping
Sale - Save 4%
$ 285.86

This product was last offered at the strikethrough price on
05-03-2026

$ 275.29 USD
Free Shipping
This kit is contains all new strut and shock mounts and hardware needed when installing a aftermarket suspension on your vehicle.

Complete Rear Upper Shock Mounting Kit
10X Entries Into Our F80 M3 Sweepstakes
Upper damper nuts vary in size from shock to shock. If you wish to replace them please measure your da
Packaged by Turner - Corporate Logo
T#:15677562
Part#: 07119905374-KT
Ships on Feb 24, 2027
Sale - Save 15% $ 115.30

This product was last offered at the strikethrough price on
05-03-2026

$ 98.18 USD
Free Shipping on orders $49 and up
Sale - Save 15%
$ 115.30

This product was last offered at the strikethrough price on
05-03-2026

$ 98.18 USD
Free Shipping on orders $49 and up
Complete rear upper shock mounting kit includes everything you need to replace old, hardened mounts with new heavy duty replacements. Body seals, hardware, and reinforcement plates are included. Kit includes: Heavy-duty, German-made Lemfoerder rear shock mounts from the E46 M3 Elring shock mount gaskets Heavy-duty ECS rear shock mount reinforcement plates Locking nuts
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Performance Suspension Cup Kit - Sport
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:56616406
Part#: 29119-1KT2
Ships on Oct 29, 2026
New Item
$ 1,443.99

This product was last offered at the strikethrough price on
08-31-2026

$ 1,314.99 USD
$ 1,314.99 USD
Stock BMW suspensions are great out of the factory, but over time, factory shocks wear down, causing floating feels, nose dives during braking, and excess body lean in corners. By mating Bilstein’s precision B6 damping with H&R’s progressive Sport Springs, this kit is designed to eliminate body roll, tighten up turn in response, and give your BMW a lowered stance all without the super stiff, crashy feeling of track springs
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