This system will cover your XJs unibody in 3/16" steel from bumper mount to gas tank skid and trailer hitch mount. Three individual PAIRS of WELD IN CNC cut and bent pieces create a strong frame much more resistant to twisting and bending. We recommend the welding be done by a professional. All pieces of the system utilize wrap around design to create the strongest set of stiffeners on the market! We are also the ONLY company that includes the inner stiffener for in between the steering box!! Available with or without spacers welded to it. Our welded in spacers accommodate the stock, Durango and S10 steering boxes.