The IAG Street Series Pitch Mount Bushing Kit is designed specifically for our CNC pitch mount. Our pitch mount is specifically designed with the ability to swap bushings for street or track use. The Street Series kit includes (x2) 75A durometer bushings that are slightly stiffer than the Subaru Group N mounts. The 75A durometer bushings reduce the motor and transmission movement under hard acceleration. Due to the higher durometer used in the street series bushings, slight NVH (Noise Vibration Harshness) is perceivable through the interior.