034Motorsport's Density Mounts are the new standard in comfort and performance. These mounts are redesigned with performance in mind and manufactured from high-durometer rubber for increased performance and durability without sacrificing comfort. Density Line Mounts are void-free and fluid-free, eliminating the slop associated with the factory mounts.

034Motorsport Density Line Transmission Mounts are manufactured from a 60 Durometer or 70 Durometer, void-free and fluid-free construction, which is a significant upgrade from the fluid-filled rubber used in stock BMW E9X M3 transmission mounts. The tail shaft of the transmission compresses and pulls up on the mounts, meaning the mount materials should be able to withstand both forces. In addition to these two forces, there are shear-twisting forces within the transmission mount assembly. Given that Polyurethane cannot withstand these forces reliably, it is not a long-term viable material for an upgrade in this location. Rubber is the ideal material for this transmission mount upgrade, as it can withstand stress under tension, compression, and shear.

The result is greatly reduced drivetrain slop and crisper shifting, with little to no increase in noise, vibration, or harshness (NVH) inside the cabin. The solid-rubber, void-free design eliminates the risk of collapse, a common issue with factory mounts. These mounts are a completely re-engineered performance solution, not just inserts for use with the factory mounts.

Which Durometer Should You Choose — 60 vs. 70?

Feature	Street Density (60D)	Track Density (70D)
Best For	Daily & Spirited Driving	Aggressive Street & Track Driving
Drivetrain Control	Reduced slop vs. factory	Further reduced for max control
Shift Feel	Crisper, consistent	Most direct
NVH / Comfort	OE-like, next to no NVH change	Moderate vibrations & transmission whine audible

 

Street Density Features:

• Manufactured from 60 Durometer Rubber with Void-Free Construction
• Reduced Drivetrain Slop
• Decreased Transmission Movement Under Load
• More Direct Power Transfer
• Improved Shifting Feel
• OE-like NVH
• Complete Drop-In Replacement for Factory Transmission Mounts
• Sold as a Pair

Track Density Features:

• Manufactured from 70 Durometer Rubber with Void-Free Construction
• Reduced Drivetrain Slop
• Decreased Transmission Movement Under Load
• More Direct Power Transfer
• Improved Shifting Feel
• Complete Drop-In Replacement for Factory Transmission Mounts
• Sold as a Pair

WHAT'S INCLUDED:

• 034Motorsport Density Line Transmission Mounts

Part Number Interchange:

• 22 31 2 283 285