Supreme Suspensions - GMC Sierra 1500 Lift Kit 2" Front Aircraft Billet Strut Spacers (Black) FITMENT: 2007 (New Body Style) - 2018 GMC Sierra (2WD 4WD), 2007 - 2018 GMC Yukon 1500 (2WD 4WD). Only fits 6-Lug models. CONTENTS: 2x Aircraft Billet Front Strut Spacers, Installation Hardware, Installation Instructions, and Supreme Suspensions Pro Pack. TECHNICAL NOTES: 2 inch front suspension leveling lift. Factory shocks can be reused without compromising ride quality. INSTALLATION: Easy bolt-on installation takes 1 to 2 hours without the need for special tools. An alignment is recommended after install. BENEFITS: Improves the look of your vehicle and increases ground clearance, allowing you to fit larger custom rims and tires.