The guys at Competition Engineering say these Slide-A-Link traction bars will cut half a tenth off of your 60 ft. times. The secret is their innovative telescoping design, which gives you two full inches of adjustability when setting pinion angle and spring preload. That gives you more control over front-end lift and weight transfer, so you can make quick, easy, on-car adjustments to track conditions. The bars come with special urethane bushings that store energy to prevent unloading between shifts, replacement lower axle mount pads, 1/2 in. U-bolts, aluminum front spring eye bushings, hardware, and complete instructions.