Secondary Differential Bushing - BMW F80 / F82 / F83 / F87 - M4 / M3 / M2

The Revshift polyurethane secondary differential bushing adds a second mounting point to the rear side of the differential on the BMW F80 / F82 / F83 / F87 - M4 / M3 / M2. This bushing must be used with a dual mount differential bracket. The oem differential bracket is not compatible. The goal of this secondary bushing is to reduce the movement of the differential under load. These bushings are a two piece design which securely holds the differential in place preventing it from sliding or twisting. Improves handing Will not wear out like oem bushings Properly dampens the differential Prevents differential from moving / twisting Revshift bushing lube included Lifetime warranty Sold as a complete set Hardness80A Street (Black): Slightly stiffer and stronger than OEM rubber. No increase in NVH. Great choice as an upgraded stock replacement (OEM+).95A Track (Green): Significantly stiffer and stronger than OEM rubber. Noticeable increase in NVH. Excellent for enthusiastically driven street and track cars.75D Drift (Teal): Drastically stiffer and stronger than OEM rubber. Moderate increase in NVH. Most commonly used on dedicated drift and track cars.(NVH = noise, vibration, harmonics)Learn more about choosing polyurethane here: https://revshift.com/pages/polyurethane Please specify the hardness