Rear Suspension Kit1978-1987 GM G-BodyAdjustable Upper Control ArmsPolyurethane BushingsRed BMR's polyurethane, non-adjustable Rear Suspension Kit consists of non-adjustable lower control arms, on-car adjustable upper control arms, and control arm reinforcement braces. The lower control arms are manufactured from heavy-duty 1.50-inch diameter, 0.120-inch wall, DOM steel tubing, the lower control arms provide all the strength you'll need for any performance application. The upper control arms are manufactured from 1.25-inch diameter, 0.120-inch wall, DOM steel tubing, strong enough for any compression load. The center adjuster is CNC-machined from chrome-moly steel with rolled threads for the ultimate in strength and durability. This design gives you a strong control arm.