These lightweight control arms are designed for road racing. The adjustable length allows you to square the axle to your chassis. Spherical rod ends assure precise axle control, while allowing the rear suspension to articulate as freely as it should. They weigh only 2.5 pounds each. Hard-anodized black. Expect increased noise in street applications. Not for drag racing. Installation requires rear coil-overs and a Maximum Motorsports adjustable rear swaybar.