BBK Performance Parts Gripp Rear Control Arms for Ford Mustang applications provide increased handling, control and grip for firmer launches on street or track use. Factory rear control arms can become weak and unstable over time, these BBK direct replacement control arms will deliver the durability and traction needed to plant the rear end to the ground. BBK's Gripp rear control arms are constructed from box-formed, heavy-gauge steel that is precision welded and with a powdercoated finish. They include high-quality polyurethane bushings with greaseable zerk fittings.