A revolutionary, completely bolt-on traction device designed for both street and strip use is track tested and competition proven to outperform conventional ''Slapper'' bars. A solid mounted front plate is installed inside the original front spring pocket and clamps to the leaf spring to provide a positive displacement for the torque that is transmitted from the rear axle through the telescoping bar and special durometer shock pad. Free travel and pre-load adjustments are made on the vehicle by adjusting the jack screw at the rear of the bar. Each kit includes replacement lower axle mount pads, 1/2'' U-bolts, replacement aluminum front spring eye bushings, hardware and complete instructions.