The Dixon kit deletes the low-performance OEM torsion bars and replaces them with high-quality coilover shocks. Since the coilovers hold up the truck's weight, proper design and overall strength must be built into the shock hoops. These 4130 hoops use a simple, strong design to get the job done. Check out the way that the tubes are welded to plates. The plates are then welded to the frame and distribute stress over a larger area. Welding the tubes directly to the frame without plates tends to concentrate stress into a small area and often leads to cracked and torn framerails. A crossbar adds strength by tying the hoops together.