Motobilt Jeep wheelbase stretch kits are designed to utilize a Jeep XJ leaf spring to relocate the axle back roughly 6 inches on the Jeep CJ (1976 - 1986) and the Jeep Wrangler YJ (1987 - 1995). The kits feature integrated rear bumpers with shackle hangers. The kits also include d-ring mounts on the bumper. The kits are a weld on design and will require fender trimming for tire clearance. We highly recommend a fabricated traction link in the rear with this kit to control axle wrap. Call us at Motobilt if we can assist with your custom Jeep build.