At the top of our Super Duty line is our famous 4 Link System that provides unsurpassed articulation and wheel travel. Large 2'' OD heavy wall links feature race style 1'' Uniballs for superior strength. Thick 1/4'' steel brackets secure the 4 Links to the frame without cutting or welding. This 4 Link system includes our replacement Coil Springs. The system also includes Billet Sway bar links, Trac Bar relocation bracket, Pitman Arm and more. Rear lift is a block & u-bolt kit. Includes front and rear 2.25 Dirt Logic Stainless Steel shocks.