Fitment: BMW E90 / E92 / E93 M3 (2008-2013), E60 / E61 M5, and E63 / E64 M6.These transmission mounts are made by Revshift in the U.S.A. from high grade polyurethane.Revshift mounts are the most durable and reliable mounts on the market. CNC machined 6061-T6 billet aluminum flanged ends are molded deep into the polyurethane which prevent the isolated ends from separating under extreme loads. The class 14.9 threaded studs are removable with a hex wrench for ease of installation.Sold as a pairLifetime warranty Hardness80A black: Slightly stiffer and stronger than OEM rubber. No additional NVH. Great choice as an upgraded stock replacement (OEM+).95A green: Significantly stiffer and stronger than OEM rubber. Minor increase in NVH. Excellent for enthusiastically driven street cars and track cars.70D TEAL: Drastically stiffer and stronger than OEM rubber. Moderate increase in NVH. Most commonly used on dedicated track cars.(NVH = noise, vibration, harmonics)