The stock upper control arm bushings found on most cars have a rubber bushing material that is bonded to the inner sleeve and the outer housing. Bonding the rubber bushings makes them resistant to rotation and suppresses front end lift and hinders weight transfer. Competition Engineering's Upper A-Arm Bushings are a non-bonded design, which lets the bushing material rotate. This allows the A-Arm to pivot freely on the cross shaft, resulting in rapid front end lift and increased weight transfer. The superior polyurethane material comprising our Bushings doesn't flex or break down like stock conventional rubber bushings with exposure to oils, chemicals and ozone.