Tuff Country EZ-Ride Suspension's Chevy Silverado/GMC Sierra 2500HD/3500HD truck torsion bar keys (leveling kit) are designed to level trucks equipped with factory torsion bars. These easy to install replacement torsion bar keys reindex the factory torsion bars which levels the truck without cranking up the factory torsion bars.Details: 2 Inch Front Leveling Kit Constructed of high quality steel Heavy Duty torsion bar keys Bolt-on installation Level front of your truck with rear New shocks not required No need to crank up torsion bars Limited Lifetime Warranty Made In The USA Sold As A Kit Fits: 2011-Present Chevrolet Silverado 2500HD WD/2WD 2011-Present Chevrolet Silverado 3500HD 4WD/2WD 2011-Present GMC Sierra 2500HD 4WD/2WD 2011-Present GMC Sierra 3500/3500HD 4WD/2WD Installation Notes: Once installed torsion bar keys (regardless of brand) can result in a harsher ride New extended shocks are not required to install this leveling kit properly Torsion bar keys are designed to install with a stock suspension only. Do not use with other types of lift kits. Will void warranty Amount of Lift: 2 inches Front / 0 inches Rear Includes: 2) Torsion Bar Keys