Designed to be used either by itself or in conjunction with our Upper Coil-Over Shock Mount Kit. Provides a solid, adjustable mounting point for racing coil-over shocks. Fits housings with 3" O.D. axle tubes. Allows 6" of height adjustmnet in 1/2" increments. 1/4" thick housing brackets, 3/16" thick shock brackets. Fits most popular coil-over shocks. Includes Grade 8 hardware and spacers for mounting two shocks. Welding required.