Rough Country - 1.5" - 2" Leveling Torsion Bar Keys for Select Chevy Silverado & GMC Sierra 1500HD 2500HD Trucks ("FT" RPO Codes) FEATURES: Easy bolt-on installation; Increased ground clearance; Levels the front with the rear of the vehicle; Forged torsion bar adjuster keys; Keys are indexed to not stress OE components; Forged torsion bar adjuster keys; Shock extension brackets allow the use of your factory shocks Above models require RPO codes starting with "FT" (FT2, FT3, FT4, FT5, FT6, FT7) KIT CONTENTS: FRONT: Forged torsion bar adjuster keys, Shock extension brackets Features: Easy bolt-on installation; Increased ground clearance; Levels the front with the rear of the vehicle; Forged torsion bar adjuster keys; Keys are indexed to not stress OE components; Forged torsion bar adjuster keys; Shock extension brackets allow the use of your factory shocks FITMENT: 2001-2006 4WD/2WD Chevrolet 1500HD Pickup; 2001-2010 4WD/2WD Chevrolet 2500HD Pickup; 2001-2006 4WD/2WD GMC 1500HD Pickup; 2001-2010 4WD/2WD GMC 2500HD Pickup