The MSW Enhanced Engine Mounts (EEM) were developed using years of experience in racing E36, E46, and E9X cars. We’ve found that solid mounts (to include stiff polyurethane, UHMW, and Delrin) have far more drawbacks than benefits. Overtime we’ve switched to rubber mounts from different suppliers. While better than solid mounts, we were always finding small issues that weren’t addressed in existing designs. This led us to design our very own engine mounts that met all our requirements for a proper performance engine mount without the negative effects of a solid mount.
Our mounts are made locally here in the USA. Machined from solid billet aluminum and utilize NBR rubber that holds up against the high heat. The rubber insert is offered in three different durometers suited for Street, Track, or Race applications.
- Achieves stock height with included 5mm aluminum spacer
- Lower drivetrain height by removing the 5mm spacer (Spec E46 legal)
- NBR rubber insert better suited for high temperatures found near headers
- 3 options for stiffness. Street (43A), Track (57A), or Race (68A)
- Rebuild kits available for end-user servicing
- Completely captive design retains all of the safety functionality of stock mounts
- High quality Nylon lock nuts
- Solid steel thread-in alignment pin
- Compatible with all shifters, including Kinematic Speed, CAE, IRP, RTD, Samsonas, etc.
Why don’t we recommend solid engine or transmission mounts? The engine and transmission as designed by BMW were never intended to be a stressed member. Their design and materials are simply not up to handling the loads imparted on them by chassis deflection and by hard impacts. No two chassis are exactly the same, you are putting stresses on the relatively weak cast aluminum components by forcing an engine and transmission to conform to solid mounts. Sure you can shim the mounts to get the alignment closer, but this still doesn’t account for the chassis twisting and flexing under load on track. And hopefully you never have an impact or a hard off, as this almost always leads to broken engine mounting arms, cracked transmission mount ears, or worse.
We’ve seen solid mounts ruin a race or an entire race weekend time and time again. We have yet to have a mechanical failure related to engine and transmission mount since switching over to stiff rubber mounts.
Note on NVH: Our street model mounts will slightly increase Noise/Vibration/Harshness over stock liquid filled mounts, but are much more “streetable” than nearly all other performance mounts.
Transmission Mount Recommendation: We recommend pairing our engine mounts with the Rogue Engineering solid rubber transmission mounts.
Applications: Fits all 6 cylinder E36, E46, Z3, and E85Z4 models. Also fits E9X M3.
Replaces OEM parts: 11812283798, 11811140985, 11811141377, 11817837985, 22002224413 (Motorsport), 11812224413N (Motorsport), 22111095444
Installation: Installs just like stock mounts. Stock style heat shields must be used.
Sold as a complete pair with all necessary hardware.