034Motorsport Street Density Transmission Mount for BMW E9X M3

The 034Motorsport Density Line Transmission Mounts for the BMW E9X M3 set a new standard for drivetrain control and shifting precision. Unlike the fluid-filled or voided factory mounts that prioritize softness over performance, 034Motorsport uses a solid, void-free rubber construction. This design eliminates the "slop" and lurching associated with transmission movement during aggressive acceleration, deceleration, and high-G cornering.

034Motorsport specifically utilizes high-durometer rubber instead of polyurethane for this application. Because transmission mounts are subjected to complex tension, compression, and shear-twisting forces, rubber is the only material capable of providing long-term reliability and performance without the premature failure common in poly upgrades. These are complete replacement mounts, not inserts, providing a permanent solution to the common "collapsed mount" issue found in the E90/E92/E93 M3.

Key Features:

• Solid Rubber Construction: Void-free and fluid-free design eliminates the risk of mount collapse and fluid leaks.
• Enhanced Shifting: Greatly reduces drivetrain movement for crisper, more consistent gear changes, especially under load.
• Superior Material Choice: High-durometer rubber handles shear and tension forces more reliably than polyurethane.
• Direct Drop-In Fit: Engineered to the exact dimensions of the factory units (Interchange: 22 31 2 283 285).
• Performance Options: Available in two durometers to suit your specific driving style and comfort requirements.
• Sold as a Pair: Includes both mounts required for a full transmission service.

Choosing Your Durometer: Street (60D) vs. Track (70D)

Installation Tip: These mounts are a symmetrical replacement. When installing the Track Density (70D) version, expect an increase in mechanical gear whine—this is a sought-after trait for track enthusiasts as it provides better auditory feedback from the drivetrain.