Heavy Metal Suspensions - 2001-2010 Chevy Silverado/GMC Sierra 1500HD, 2500HD, 3500HD (2WD 4WD) Adjustable 1" to 3" Front Torsion Keys + 2" Rear Blocks + Extended U-Bolts + Shock Extenders Lift Kit DETAILS: Adjustable 1 to 3 Inch Front and 2 Inch Rear Lift APPLICATIONS: 2001 - 2010 Chevrolet Silverado, GMC Sierra 1500HD (2WD 4WD) and 2000 - 2010 Chevrolet Silverado, GMC Sierra 2500HD / 3500HD (2WD 4WD) PACKAGE CONTENTS: (x2) Carbon Steel Front Torsion Keys, (x2) Cabon Steel Rear Lift Blocks, (x4) Extended Plated U-Bolts, (x2) Carbon Steel Shock Extenders, Hardware and Installation Instructions. Note: Kit Does NOT Include A Torsion Bar Unloading Tool TIME FRAME: Installs In Approximately 2 - 5 Hours. Heavy Metal Suspensions products are the safest way to lift your vehicle without compromising ride quality. CNC constructed with computer programmed pulse welds, Heavy Metal high-grade steel is guaranteed never to break under even the toughest conditions. Each kit comes complete with installation instructions, high-grade hardware and ASE certified telephone support.