At the top of our Super Duty line is our famous 4 Link System that provides unsurpassed articulation and wheel travel. New for this year is a 10 inch application for additional tire clearance. Large 2 inch diameter heavy wall links feature race style 1 inch Uniballs for superior strength. Thick 1/4 inch steel brackets secure the 4 Links to the frame without cutting or welding. This 4 Link system allows the use of our replacement Coil Springs or our Dirt Logic 4.0 Coilover Shock conversion. System also includes Billet Sway bar links, Trac Bar relocation bracket, Pitman Arm and more. Rear lift options include a block and u bolt kit, replacement leaf springs or a complete Long Travel system.