Reduce wheel hop, and increase the handling ability and traction of your 1979-2004 Mustang with differential housing bearings from BMR's suspension. These bearings are how the upper control arms directly connect to the differential, making it crucial to a proper functioning rear suspensionsystem. Manufactured from CNC-machined billet aluminum, with heavy-duty Teflon-lined spherical bearing, BMR's BK074 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.