Includes KONI externally rebound adjustable sport struts (inserts on E36 M3) and KONI standard adjustable rear shocks with Sport springs. Sport Springs lower your car about 1.5-2.0 inches and are approximately 25-30% stiffer than original. This kit offers enhanced control over stock suspension without a harsh ride. Add TCKR special rear suspension mounts for improved handling over stock mounts. (This kit does not include rear shock mounts)