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 front Dirt Logic 4.0 Coilover conversion. The system also includes Billet Sway bar links, Trac Bar relocation bracket, Pitman Arm and more. Rear lift is an Add-a-leaf and block & u-bolt kit.