This kit has a simple bolt-on installation. 3 piece sub-frame kit includes skid plate, both give increased strength and eliminates squeaks and rattles in front end. It also comes with new heavy duty steering knuckles, front differential drop brackets, lateral compression struts, torsion bar drop brackets, rear blocks and U-bolts. All bushing and hardware to install these parts are also included. Models with factory Air Ride kits include shock relocation brackets and will retain the factory air ride shock.