TeraFlex SpeedBump bumpstops are an innovative composite bumpstop system designed for high-performance JK Wrangler applications. The true progressive nature of the SpeedBump bumpstop allows for the reduction of suspension compressing impacts and the associated harsh bumpstop bottoming. The absorption of harsh impacts experienced off road or even on a poorly maintained highway will reduce the risk of axle housing bends as well as provide an increased ability to maintain vehicle control. TeraFlex SpeedBumps feature performance tuned closed-cell nitrogen charged microcellular polyurethane technology providing a true progressive bumpstop that will not fade or dissipate under extended heavy use. Microcellular polyurethane technology is not affected by temperature extremes, and retains thermal and sub-zero temperature flexibility. The maintenance free SpeedBumps require no custom adjustment or tuning. The installation does not require any cutting or welding, simply install the SpeedBump and outer retainer cup into position. This kit includes two rear SpeedBump bumpstops, two outer bumpstop retainer cups, and two rear lower bumpstop strike pads. Fits JK Wrangler models with 2.5" of lift.