This kit features the same spring rods as our popular override kit, but made to mount under your car. When mounted in the underride position, the 900 lb. rated compression springs dampen wheel hop caused by extreme acceleration loads. Spring preloads are adjustable and additional spring rates are available. Aircraft quality rod end mounting points provide further adjustability and trouble free service. Includes our leaf spring plates with integral traction bar mounts that are slotted to accommodate all year rear end housings with standard 2-1/2” wide spring pads, including larger than stock 3” diameter axle tubes.