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Win this M240i!
Every $50 spent = 1 entry*

No purchase necessary to enter or win. See official rules.

Ultimate Performance Rear Shock Mount Kit

Polyurethane-isolated monoball design offers street comfort with race performance while eliminating blowouts!! Price includes both rear shock mounts.
Use with reinforcement plates for the best protection against damaged shock towers
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Product Details

Use with reinforcement plates for the best protection against damaged shock towers

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 our 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. We accomplish this with no noticeable increase in noise, vibration, or harshness (NVH) thanks to our 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, our design incorporates a lower dust seal to keep road debris, grit and other contaminates out of the bearing.  These are the best rear shock mounts available, and the last you will ever need.


  • 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. Upgraded your suspension and now need spacers for a different size shaft?

*During installation a 17ft-lb torque spec is required to avoid damage to the mounts.

Cross Reference
  • RSM, Rear shock mount, Ultimate performance, Shock mount

This Part Fits the Following Vehicles

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 2.5i 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 ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

Kit Contents

Description Brand Qty
Elring Shock Mount Gasket - E36, E46, Z3 Elring - Corporate Logo 2
Ultimate Performance Rear Shock Mount Kit ECS - Corporate Logo 1


ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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