UMI Performance 82-02 GM F-Body on Car Adjustable Lower Control ArmsUMI's on car adjustable lower control arms are supplied with a spherical rod end and polyurethane bushing combination. This set up is designed for street performance and street enthusiast. The polyurethane bushing end is designed to be bolted to the vehicle chassis side while the rod end attaches to the rear end side. Since the polyurethane bushings are softer they are designed to absorb more road noise and shock before it enters the passenger