Condor Speed Shop - Rear Subframe Bushing Kit - E90, E91, E92 & E93Our solid BMW E9X Rear Subframe Bushings are designed for the street and the track. We use UHMW in all our suspension bushings because it is stiff, has almost zero deflection yet also absorbs some vibration. It will outlast other types of rubber or urethane bushings. When the E90 is driven hard on the street & on the track, the rear subframe is exposed to extremely large twisting forces. Polyurethane and rubber bushings will deflect and slide,