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E30, E36, E46, Z3, Z4 ECS Ultimate Performance Rear Shock Mount Kit (RSM)

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Product Details

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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ECS Ultimate Rear Shock Mount:

Need 12mm or 14mm Shock Bushings?

Add RSM Reinforcements?

This Part Fits the Following BMWs

Make Model Submodel Engine
BMW E30 318i M10 1.8L
BMW E30 318i M42 1.8L
BMW E30 318is M42 1.8L
BMW E30 325 M20 2.7L
BMW E30 325e M20 2.7L
BMW E30 325es M20 2.7L
BMW E30 325i M20 2.5L
BMW E30 325is M20 2.5L
BMW E30 325ix M20 2.5L
BMW E30 M3 S14 2.3L
BMW E36 318i M42 1.8L
BMW E36 318i M44 1.9L
BMW E36 318ic M42 1.8L
BMW E36 318ic M44 1.9L
BMW E36 318is M42 1.8L
BMW E36 318is M44 1.9L
BMW E36 318ti M42 1.8L
BMW E36 318ti M44 1.9L
BMW E36 323ic M52 2.5L
BMW E36 323is M52 2.5L
BMW E36 325i M50 2.5L
BMW E36 325ic M50 2.5L
BMW E36 325is M50 2.5L
BMW E36 328i M52 2.8L
BMW E36 328ic M52 2.8L
BMW E36 328is M52 2.8L
BMW E36 M3 S50 3.0L
BMW E36 M3 S52 3.2L
BMW E46 323Ci M52 2.5L
BMW E46 323i M52 2.5L
BMW E46 325Ci M54 2.5L
BMW E46 325i M54 2.5L
BMW E46 325xi M54 2.5L
BMW E46 328Ci M52 2.8L
BMW E46 328i M52 2.8L
BMW E46 330Ci M54 3.0L
BMW E46 330i M54 3.0L
BMW E46 330xi M54 3.0L
BMW E46 M3 S54 3.2L
BMW Z3 1.9 M44 1.9L
BMW Z3 2.3 M52 2.5L
BMW Z3 2.5 M52 2.5L
BMW Z3 2.5i M54 2.5L
BMW Z3 2.8 M52 2.8L
BMW Z3 3.0i M54 3.0L
BMW Z3 M Coupe S52 3.2L
BMW Z3 M Coupe S54 3.2L
BMW Z3 M Roadster S52 3.2L
BMW Z3 M Roadster S54 3.2L
BMW Z4 2.5i M54 2.5L
BMW Z4 3.0i M54 3.0L
BMW Z4 3.0i N52 3.0L
BMW Z4 3.0Si N52 3.0L
BMW Z4 M Coupe S54 3.2L
BMW Z4 M Roadster S54 3.2L
*The above product applications have been written by Turner Motorsport. All warranties, product application, fitment, and performance are the responsibility of Turner Motorsport. For additional information see the terms of use.
  • 22 years of BMW Tuning.
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