Prothane Radiator Support Bushings 73-87 Chevy / 68-87 GM Passenger Cars w/ Small Block V8 This is a set of 4 [BLACK] Rubber and/or worn out radiator mounts mean excessive vibration and play that compromise your ride quality. These problems are easily remedied with polyurethane mounts by Prothane, which will give you a safer, smoother driving experience. Prothane, known for their affordable polyurethane suspension parts, gives enthusiasts performance solutions designed to last. Replaces old, worn out or rubber mounts and/or serves as an upgrade Made of polyurethane compound that far outperforms rubber Encourages better handling and performance Replace your worn out oem bushings with Prothane's high-performance polyurethane bushings! Get rid of all the annoying movement and play with these heavy duty motion control bushings. PROTHANE Motion Control has become synonymous with innovative, hi-performance polyurethane or urethane for short, based bushings and driveline components. From bushing, bump stops and body mounts to stressed driveline components like motor and transmission mounts and lift kits, PROTHANE engineers are constantly developing innovative new hi-performance polyurethane based parts. As enthusiasts and racers, we take great pride in being the first to bring you better polyurethane bushings, transmission and motor mounts to enhance the performance of your vehicle.