To help eliminate wheel hop and give you the extra traction you need, Granatelli Motorsports has designed these heavy duty rear control arms. Tubular steel is used in place of the factory u-channel stamped steel design because round tubular DOM steel tubing is much stronger and lighter than the factory pieces. These control arms are constructed of 1.65inch diameter .120inch wall drawn over mandrel steel tubing which is precision welded and include genuine Energy Suspension fluted polyurethane bushings with Zerk fittings. Each system includes premium hardware and detailed installation instructions.