Reduce wheel hop, and increase the handling ability and traction of your 1979 - 2004 Mustang with stainless steel differential housing bearings from BMR Suspension. These bearings are how the upper control arms directly connect to the differential, making it crucial to a proper functioning rear suspension system. Manufactured from CNC - machined stainless steel, with heavy - duty Teflon - lined spherical bearing, BMRs BK075 differential bearings can stand up to nearly any power levels. The assembly is completed with CNC - machined aluminum spacers for a perfect fit for the upper control arms.