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, and a rear Block & U-Bolt kit. Includes Dirt Logic front and rear shocks. Estimated installation time is 6-7 hours. Amount of holes to drill - 6. No welding required.