This kit manufactured by UMI Performance includes a set of tubular rear lower control arms and a set of adjustable rear upper control arms. This control arm kit is a direct bolt-on replacement designed to minimize wheel hop, improve cornering and help track consistency on you're A-Body vehicle. Stock control arms are on the borderline of junk, bushing deflection and rusting weak stamped material add for traction loss and poor handling ability. Whether your car is a weekend cruiser or weekend track addict this kit works on all applications. Lower control arms feature grease-able Energy Suspension bushings, TIG welded construction for the utmost in strength and correct provisions for adding a stock or aftermarket sway bar. Sway bar holes are reinforced with a 0.120" wall thickness steel sleeve TIG welded and sanded into place to prevent the control arm from crushing. The included adjustable upper control arms allow you to adjust your vehicles pinion angle for optimum performance, precise handling and improved traction. Adjustable upper control arms are constructed of CNC machined 0.250" steel mounting plates, 4140 chromoly threaded tube adapters and a high strength, 4140 chromoly, heat treated 1.000" solid adjuster. UMI Performance's unique on-car adjuster allows for easy adjustments with out removing or unbolting the control arm from the vehicle. These control arms also feature grease-able Energy Suspension fluted polyurethane bushings and durable gloss powder coat.