Our Hummer system is constructed much like all of our IFS systems with extended steering knuckles and high clearance cross members but the similarities stop there. Also unique to this system is two 1/4 Inch thick skid plates, one for the front differential and one for the transfer case. Rear lift on factory air bag H2's comes from a super stout bag spacer while coil spring models receive replacement coil springs that are driver and passenger specific.