Revshift polyurethane rear subframe bushings completely replace the oem rubber bushings on the BMW E34 5 series including the M5. They also fit the BMW E32 7 series. These bushings stiffen the subframe improving the vehicles handling capabilities. Improves handing Will not wear out like oem bushings Properly dampens the rear subframe Revshift bushing lube included Lifetime warranty Sold as a 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
