Don't neglect your motor mounts! Most stock BMW motor mounts are fluid filled and the stiffness of the mount depends on this fluid. But over time the fluid leaks out and the strength of the mount is greatly reduced. A worn motor mount allows the engine to twist and shift around. The harder you're driving the more shift will occur. As the engine is moving around it can contact other parts in the engine bay - usually cooling related. The mechanical fan can hit the radiator; the A/C compressor can hit a radiator hose, the exhaust will flex and may break. Twisting of the engine can also lead to shifting problems as the transmission twists with it. There are countless issues related to worn or compressed motor mounts so don't overlook these as a regular replacement item (every 50,000 miles).
Anchor your engine and maximize torque transfer. This 95A durometer Black Series bushing stops lower engine mount deflection, providing track-validated shifting precision and eliminating wheel hop on high-G launches.
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Optimized for high-performance street driven vehicles, weekend track endurance, and autocross. Offers a significant increase in stiffness over OEM without sacrificing daily drivability.
