Supreme Suspensions - GMC K2500 K3500 1 - 1 - 3" Adjustable Front Lift Torsion Keys + 1 - 3" Rear Lift Blocks + Torsion Tool + Shims Suspension Leveling Lift Kit 4WD 4x4 Designed to Lift your front end 1 to 3 inches and rear end 3 inches while maintaining factory ride quality Prevents your stock shocks from over extending Improves Axle alignment and eliminates unwanted vibrations in the suspension U-Shaped design covers both sides of the cross member firmly to distribute load evenly when removing torsion keys Supreme Suspensions Bolt-on kits will improve the look and feel of your truck without cutting or welding