Condor Speed Shop - Poly Transmission Mount Set - E30Our 70A poly transmission mounts are the solution if you are trying to improve performance while minimizing vibration and NVH. They are "bolt through" style mount which means the bolt goes through the entire mount. They are comparable to BMW Group N mounts in hardness and are 30% stiffer than the stock mounts, which makes them perfect for weekend fun cars, or the occasional autocross. Currently they are the softest polyurethane mount on the market,