Supreme Suspensions - Yukon XL 2500 Lift Kit 1" to 3" Front + 1" Rear with Shock Extenders 4x2 4x4 PRO FITMENT: 2000 - 2013 GMC Yukon 2500 XL (2WD 4WD). Fits 8-Lug Models Only CONTENTS: 2x Carbon Steel Adjustable Torsion Keys, 2x Billet Aluminum Rear Lift Blocks, 4x Plated Steel U-Bolts, 2x Carbon Steel Shock Extenders, Installation Hardware, Installation Instructions and Supreme Pro Pack TECHNICAL NOTES: 3 inch front and 1 inch rear suspension lift. Factory shocks can be reused without compromising ride quality. INSTALLATION: Easy bolt-on installation takes 2 to 4 hours. An alignment is always recommended if you are altering the height of your vehicle. BENEFITS: Improves the look of your vehicle and increases ground clearance, allowing you to fit larger custom rims and tires. (2x) Carbon Steel Adjustable Torsion Keys (2x) Billet Aluminum Rear Lift Blocks (4x) Plated Steel U-Bolts (2x) Carbon Steel Shock Extenders Installation Hardware Installation Instructions Supreme Suspensions Pro Pack