IAG Performance Street Series Pitch Stop MountThe IAG Street Series Pitch Stop Mount reduces engine and transmission movement under hard acceleration. The CNC machined billet aluminum mount includes (x4) 75A durometer bushings and a black anodized finish for corrosion protection. The street series 75A durometer bushings are slightly stiffer than the Subaru Group N mounts and due to the higher durometer used in the bushings, slight NVH (Noise Vibration Harshness) is perceivable through the