The IAG Race Series Solid Bushing Kit is made specifically for IAG Subaru EJ Transmission Mounts, and is compatible with 2002-2007 WRX, 2004-2021 STI, and 2004-2008 Forester XT. These solid steel bushings leave no room for lurching or movement. This means the available torque at the crank will directly transfer to the drive train, enabling a large amount of power to be transferred to the wheels. The IAG Race Series Solid Transmission Mount Bushing Set provides solid stability for high-powered builds.

The IAG Race Series Bushings are constructed from solid steel, providing a solid foundation for your high-powered EJ Subaru engine. Whether you’re looking for performance gains at the track, the dragstrip or for autocross, these solid mounts are engineered to meet the demands of competitive driving. Due to the steel-on-steel design of the bushings, an increase in NVH (Noise, Vibration, Harshness) in the cabin is to be expected, as is typical with solid racing mounts.

A standout feature of IAG’s Transmission Mounts is their interchangeable design, letting you adjust the bushing stiffness as your performance needs evolve. While the 55A durometer bushings will provide you with a quiet, comfortable ride, we also have stiffer options for high-performance applications. The next step up is our 75A Street Series Bushing Kit, Competition Series Red 90A Bushing Kit, and finally, the included Solid Steel Race Bushings that significantly increase the stiffness and NVH over the stock and GROUP N mount (Comfort, Street and Competition Bushings sold separately).