Revshift billet aluminum subframe bushings completely replace the oem rubber bushings on the BMW E82, E81, E87, E88, E90, E91, E92, and E93 including the M3, 1M, and XI models. These bushings solid mount the rear subframe reducing wheel hop and improving the vehicles handling capabilities. The two piece bushing design sandwiches the subframe locking it in place. It will not shift on the bushings while driving like the one piece designs allow. They are CNC machined at Revshift in the USA from 6061-T6 billet aluminum.