Torsion Bar Keys (Forged Steel) | 1-3" Adjustable Lift | For 99-06 GMC Chevy Chevrolet Trucks Avalanche Silverado Tahoe Sierra Yukon 4x4 4WD 4x2 (See Description for exact year/model) Leveling Kit [VERIFY FITMENT] Important to check vehicle fitment list located in the Product Description Adjustable 1-3" Lift Forged Steel Torsion Keys Designed to be solid and not bend or warp under stress <span class="a-text-bold">Lift Height</span>: 1-3 inches (adjustable) <span class="a-text-bold">Color</span>: Black <span class="a-text-bold">Material</span>: Carbon Steel <span class="a-text-bold">Added Process</span>: Heat Treatment <span class="a-text-bold">SUSPENSION GEOMETRY</span>:<span class="a-text-bold"> </span>Your Chevy/GMC<span class="a-text-bold"> </span>does not have 1:1 suspension geometry so the measured height of the torsion key will not be same as the advertised lift height. <span class="a-text-bold">LIFT HEIGHT</span>: The lift specified above is only applicable if you have not added / changed other suspension components. <span class="a-text-bold">ALIGNMENT</span>: It is necessary to get an alignment after the installation of this item to achieve the full lift height. Designed to be solid and not bend or warp under stress. Designed with an effortless install process in mind. Install would take approximately 2 hours with common hand tools. No cutting, welding, or any other form of modification required. Will help to level out your ride height due to added accessories. Will help to accommodate larger diameter tires. <span class="a-text-bold">SAFETY / INSTALL WARNING</span>: Installation by trained professional highly recommended. <span class="a-text-bold">FITMENT</span>: This will only fit on the vehicles listed above. If you have a different vehicle, please see the &#034;Questions &amp; Answers&#034; section below.