Say goodbye to rear end clunks! With the introduction of the Rogue Engineering Rear Shock Mounts, you have a high quality, rebuildable, easily serviceable rear shock mount.
Fits the following vehicles:
- All E30
- All E36, Z3 and 318ti
- All E46, excluding convertible
- All Z4
Rogue Engineering Rear Shock Mount Set includes:
- Two (2) Rogue Engineering 6061-T6 CNC, Anodized Rear Shock Mounts
- Four (4) Shore A 65 Bushings (2 required per mount)
- Two (2) 303 Stainless Steel Bushing Spacers (to be used with standard 10mm rear shocks)
- Four (4) 303 Stainless Steel Washers (2 required per mount)
- Four (4) Yellow Zinc plated serrated lock nuts
- Two (2) Shock Tower Reinforcement Assemblies (with 10.9 hardware welded)
- Two (2) factory gaskets (#33-52-1-128-734)
Problems with Factory Mounts
The factory BMW rear shock mounts are generally a little soft, to provide the most possible acoustically dampening in the vehicle. However, design precludes them from being stout enough to withstand the rigors of aftermarket suspension, or even badly damaged roads. A decent sized pothole can send a perfectly good factory rear shock mount to pop out, making it entirely useless necessitating replacement. Upgrading to E46 M3 rear mounts (a popular alternative) is not a guarantee that it doesn't happen again and again.
Because of poor design and extensive abuse, stock BMW rear shock mounts often fail with the inner metal sleeve separating from the rubber bushing. Usually, this manifests itself assqueaking, rattling, clunking and deflection of the rear shock mount, leading to poor suspension performance and a great deal of annoyance. Replacing the RSM's with OEM units provides temporary relief, but invariably they fail again, usually in 20K miles or so, but often MUCH less when aftermarket high performance shocks are used.
Rogue Engineering Rear Shock Mount Features
By producing a rear shock machined from 6061-T6 aluminum, we are able attain a more stable, and stiffer platform which to mount the top of the rear shock. However, rather than use race-only spherical bearings or even overly stiff urethane bushings, we specify Shore A 65 hardness rubber bushings (approximately 30% stiffer than the factory bushings) to allow for some level of street comfort. The orientation of the bushings makes it impossible for the bushings to "pop out" in the manner which the factory mounts fail. If required, the bushings are also replaceable, when the time comes to rebuild them.
Other important details include the use of 303 stainless steel components (compressions washers and spacers) for long-lasting corrosion resistance. All other hardware is either Grade 8 or better, treated with a yellow zinc plate, again for corrosion resistance.
Protection and Quick Installation/Removal
Another feature is the reinforcement assembly which secures the rear shock mount to the vehicle. By reinforcing the top of the shock tower in the vehicle, it protect against the rear shock from ripping out the sheet metal.
Additionally, the reinforcement has its hardware welded to it, allowing for the rear shock mount to become a bottom-mount design. This means that if the rear shocks need to be removed, it only requires removing the two nuts and the single bolt at the bottom of the shock. Once installed, there is no need to completely disassemble the trunk area to gain access. If being used with a rear strut tower brace, the reinforcement assembly may be mounted from the bottom, so that the rear shock mount can be secured in the traditional manner.
The Rogue Engineering Rear Shock Mounts are designed to be used with standard 10mm rear shocks, but can also be used with 12mm adjustable race shocks with the use of optional washers.
*Shock mounts modified for convertible 3 Series cars have the reinforcement plate cut to fit in the confined area resulting from the soft top design. Z3 convertible cars will take the standard stock mount design.
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