UMI's rear lowering kit for 2015+ F-150 is the best solution to achieve that perfect stance and turn your truck into a high performance muscle truck. This kit lowers the rear of the truck approx 3.5-6.5 inches and retains the factory Ford leaf springs. Along with the new hheavy-dutylowering bracketry, UMI's rear lowering kit includes Viking double adjustable shocks, pinion angle shims, transmission spacer, new bump stops and longer leaf spring pins. The Viking shocks completely transform the truck into a corner carving, drag racing, or street worthy machine with nice ride quality. Many kits in the aftermarket yield a truck with annoying vibrations and a harsh ride, but UMI's design engineers worked to reduce or eliminate that feeling with pinion angle shims, transmission spacer adjustment, longer bump stops and proper leaf spring pins. Greatly improved handling meets factory smoothness with UMI's 6563 kit. 100% Made In USA.