At the top of our Super Duty line is our famous bolt-on 4 Link System that provides unsurpassed articulation and wheel travel. These 2″ diameter 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 is comes complete with our replacement Coil Springs, Sway Bar drops, Pitman Arm, rear Block & U-Bolt kit, and the choice of Fabtech’s Performance, Stealth, or Dirt Logic Shocks.