The rear is a much more install-friendly design. Replaced is the factory coil spring with a double-bellows air spring, giving you a 5.6-inch drop. To keep the rear from bouncing down the road, Air Lift used a 30-level damping adjustable, monotube, threaded body shocks. With black chromed shock bodies and bright red accents, these shocks look just as sharp as they function. And there�۪s no welding necessary for this kit���just check out the Air Lift Performance instruction manuals and have basic hand tools nearby to complete installation.