ACDelco Professional Radius Arm Bushing Kits are the high quality replacement ideal for many vehicles on the road today. These bushings connect your vehicleâs radius arm to the wheel carrier or axle, allowing it to control wheel motion while allowing your vehicleâs suspension components to move. These professional-grade bushings are constructed of rubber, or metal and rubber, for long life and durability. These premium aftermarket replacement kits meet the performance standards you would expect from ACDelco.