This kit replaces both the rear upper and lower rear control arms on  any 78-96 GM B-Body. Kit is designed to reduce traction loss and  minimize wheel hop found with stock control arms. Control arms are  fixed length and match GM specs. Lower control arms feature reinforced  sway bar holes to accept stock or aftermarket sway bars.   Kit Includes:  (1) Set- Boxed Lower Control Arms Item # 3615 (1) Set- Tubular Upper Control Arms Item # 3616