034Motorsport's Density Line Mounts are the new standard in comfort and performance. Our 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.

The Street Density Engine Mount Pair is manufactured from 60 durometer rubber, approximately 25% stiffer than stock. Since the mounts are also void-free and solid-filled, the resulting mount is approximately 60% stiffer than the stock. The cast aluminum mount bodies have also been redesigned to cope with the added stress of spirited driving.

The result is greatly reduced drivetrain slop, crisper shifting, and minimal wheel hop, without any significant increase in noise, vibration, or harshness (NVH) inside of the cabin. These mounts are a completely re-engineered performance solution, not just inserts for use with the factory mounts.

High-Durometer Rubber vs. Polyurethane:

Density Line Mounts are manufactured from high-durometer rubber instead of polyurethane for several reasons. While vulcanized rubber mounts are more expensive to prototype due to the increased manufacturing complexity and high initial tooling costs, rubber is inherently better than polyurethane as a damping medium for mounts and bushings.

Rubber can deal with stress under both tension and compression, while polyurethane mounts rely on the damping medium to be effective only under compression. Rubber is also excellent in shear, where polyurethane is ineffective, making it ideal for control arm bushings that apply a shear force to the bushing during articulation.

Rubber does not pack and wear like polyurethane does, resulting in a long-lasting part with consistent performance and comfort.

NOTE: 

This Street Density Mount application features stiffer and less compliant rubber. However, the mount is not designed to see significantly larger amounts of abuse, as Density Mounts use a similar design and construction to the OEM mounts. This means that driving dynamics are improved, but these mounts are not necessarily suited for more punishing applications or abuse. Normal "sport driving" typically sees these mounts lasting up to 50k miles or more. More abusive use, such as aggressive drag racing, clutch dumps, aggressive shifting, and big increases in power, can cause these mounts to fail or wear prematurely, typically in 20k miles or less. For mounts that will sustain the latter abusive scenarios, we strongly recommend our Motorsport Mounts, which are designed specifically for such use.