The Street Density Strut Mount is manufactured from 70 durometer rubber, which is approximately 50% stiffer than stock. The rubber is also fully vulcanized to the center cups to increase the lifespan and performance of the mounts significantly.
The steel strut mount bodies have also been redesigned to cope with the added stresses of spirited driving.
The result is a significant reduction in deflection of the strut mount. These mounts will also eliminate the annoying "squeaking" sound often caused by the stock strut mounts when paired with coilover suspensions. Street Density Strut Mounts will only cause a minimal increase in noise, vibration, and harshness (NVH) inside of the cabin. These mounts are a completely re-engineered performance solution, not just inserts for use with the factory mounts.