PFR34-1120BLK Transmission Mount Bush Insert Kit is made in our Black 95A material for track/motorsport use and designed to fill the voiding of the OE rubber. This restricts movement within the mount to provide a more precise and settled engine and transmission response during on/off throttle acceleration and deceleration, with improved shift performance. A small increase in NVH, usually at idle, should be expected when stiffening the connecting mount between the transmission and chassis. The harder the material used, the greater the NVH transmitted. Contains enough parts to fit both the Front and Rear transmission mounts.