3" Jeep Bump Stop Extension Kit is comprised of a pair of 1 pc 3" billet aluminum bump stop spacers and mounting hardware. Another great solution form JKS Manufacturing. These extension spacers attach to the front coil spring axle mounts of Jeep JK, TJ, XJ, MJ and ZJ models. They will also work on the rear of a TJ. Large diameter design provides maximum surface area for the best bump stop contact possible.