UMI Performance 59-64 GM B-Body Upper Control/Trailing Arm- inBanana ArminUpgrade your GM vehicle's suspension with rear control arms for better performance and handling. Stock control arms often suffer from bushing deflection and weak materials, leading to traction loss and poor handling. Our control arms come with polyurethane bushings, enhancing ride quality and reducing traction issues. These bolt on replacements minimize wheel hop, improve cornering, and boost track consistency, making them ideal for street cars, drag