ECS Shock Mount Kits for BMW Z4 M Roadster S54 (2003-2008)

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If you are replacing your shocks, be sure to change the mount as well. This simple step will not only increase the life of your new shocks, but will help to restore lost comfort and agility, As factory bushings age, the will begin to crack and split. Turner Motorsport carries Genuine BMW mounts as well as high quality aftermarket alternatives.

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ECS Tuning Ultimate Performance Rear Shock Mount Kit - E30 E36 E46 Z3 Z4
ECS Tuning Ultimate Performance Rear Shock Mount Kit - E30 E36 E46 Z3...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
ECS - Corporate Logo
T#:379065
Part#: 002542ECS01KT2
In Stock
Sale - Save 3% $ 393.99

This product was last offered at the strikethrough price on
05-02-2026

$ 382.17 USD
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Sale - Save 3%
$ 393.99

This product was last offered at the strikethrough price on
05-02-2026

$ 382.17 USD
Free Shipping
Add to Wish List
BMW has long suffered issues with rear shock mount blowout on M3 and non-M 3 Series models dating back to 1984 with the E30 chassis. Little changed over the following two decades, and E36, E46, and Z3/Z4 models are also prone to this style of failure. After striking a pothole or another seemingly innocuous obstacle, a clunking from the rear emerges and handling becomes sloppy. Your shocks have blown through their mounts. Enter the Ultimate Performance Rear Shock Mount Kit from ECS Tuning. Not only does their industry-first design alleviate the blowout problem once and for all, but allows rear dampers to fully articulate, for the best possible damper performance and longevity. They accomplish this with no noticeable increase in noise, vibration, or harshness (NVH) thanks to their unique rebuildable polyurethane isolation. The poly bushings not only keep NVH to a minimum, but they also reduce impact loading on the bearing, improving bearing life over full solid mounted monoball designs. To further improve bearing life and longevity, this design incorporates a lower dust seal to keep road debris, grit, and other contaminants out of the bearing. These are one of the best rear shock mounts available, and the last you will ever need. Features: Maintenance-free, PTFE lined, stainless steel monoball spherical bearing for full shaft articulation Lower dust seal for improved bearing life 80A polyurethane isolation bushings for NVH control and improved bearing life Accommodates 10mm* Fully constrained shaft mount makes blowouts impossible Hard anodized 6061-T6 construction Class 10 black zinc plated studs New OEM lock nuts included Fully rebuildable design *For use with factory-style 10mm damper shafts. If you have factory-style mounts presently, you have 10mm damper shafts. *During installation a 17ft-lb torque spec is required to avoid damage to the mounts.
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E30, E36, E46, Z3, Z4 ECS Ultimate Performance Rear Shock Mount Kit (RSM)
E30, E36, E46, Z3, Z4 ECS Ultimate Performance Rear Shock Mount Kit (...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
ECS - Corporate Logo
T#:389255
Part#: 002542ECS01
In Stock
Sale - Save 3% $ 393.99

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

Starting at $ 382.17 USD
Free Shipping
Add to Wish List
Sale - Save 3%
$ 393.99

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

Starting at $ 382.17 USD
Free Shipping
Add to Wish List

Want a race-spec rear shock mount but with the comfort of a factory bushing? This ECS rear shock mount combines the precision and articulation of a spherical bearing with the isolation of urethane bushings. The stainless monoball bearing is lined with PTFE lubricant and suspended in 80A urethane and housed in a hard anodized 6061-T6 aluminum mount. The spherical bearing is a better design than most rear shock mounts because it allows the shock to move and tilt without side-loading the shock shaft (which leads to premature failure of the shock). Most Genuine BMW and aftermarket shock mounts are not designed for shock angles and the stress that track or performance driving will put on the shock shaft. The ECS shock mount is properly designed to handle these loads. The internal bearing is also replaceable - it will be years before you have to replace the entire mount. The ECS mount is fully encapsulated to prevent the common shock mount failure of the stock mount design.

ECS RSM features:

  • Maintenance free, PTFE lined, stainless steel monoball spherical bearing for full shaft articulation
  • 80A polyurethane isolation bushings for NVH control
  • Accommodates 10mm, 12mm, or 14mm damper shafts
  • Fully constrained shaft mount makes RSM blow out impossible
  • Hard anodized 6061-T6 construction
  • Fully rebuildable design

* - the RSM comes with the BMW standard 10mm shock shaft bushings. 12mm is used on some performance shocks and 14mm is used on some true motorsport rear shocks.

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