UMI A-Body rear kit: tubular arms, bushings & hardware for better handling.UMI Performance's kit includes tubular rear lower and upper control arms, new rear end housing bushings, and Grade 8 mounting hardware. Designed as a direct bolt on replacement for A Body vehicles, it reduces wheel hop, enhances cornering, and improves track consistency. Stock control arms often cause traction loss and poor handling due to weak materials and bushing deflection. Ideal for both weekend cruisers and track cars, the lower control arms