2011 - 2013 GM 1500 2500 3500 HEAVY DUTY 2WD / 4WD Maxtrac Suspension's torsion keys offer a quick and easy solution to changing the height on the front of your vehicle, for the desired stance. The installation of these keys provide additional clearance for the front of your vehicle, allowing a larger tire size. These keys are Maxtrac Suspension's first entrance into Forged leveling solutions, as the new HD's demand tough, rugged, and the strongest parts available, and we deliver. Lifting the back is accomplished by a lifting shackle or blocks. SPECIFICATIONS FORGED Steel Construction 100% Bolt On Installation Increased Ground Clearance Powder Coated for long life. Complete with front Shock Extenders