The Kryptonite Leveling Key Set KRKEY10 will allow you to install taller tires on your GM Silverado/Sierra 2500HD/3500HD. With this Kryptonite key set, you can raise the front of your truck to the same level as the rear. These torsion keys are designed to grip the flat hex area of the torsion bar for a tighter, more stable fit. Kryptonite torsion keys are forged, making them 25% stronger than stock pieces and resistant tocorrosion. The front of the vehicle can be raised by two inches with the adjustable torsion keys, providing clearance for larger tires. This kit won't add to the stress on the original suspension parts and was created to preserve the stock ride quality. FEATURES:• Raises The Front 2"• Forged Torsion Keys• 25% Stronger Than OEM Units WARRANTY INFO:Lifetime Vehicle Applications: 2001-2010 GM SILVERADO/SIERRA 2500HD/3500HD 2WD/4WD SPECIFICATIONS Fuel Type Diesel / Gas Prop 65 WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov