Supreme Suspensions - Ford F250 F350 Lift Kit 3" Front + 1" Rear Aircraft Billet Coil Spring Spacers and Lift Blocks + Shock Extenders FITMENT: 2005 - 2016 Ford F-250 Super Duty (4WD), 2005 - 2016 F-350 Super Duty (4WD). CONTENTS: 2x Aircraft Billet Front Spring Spacers, 2x Aircraft Billet Rear Lift Blocks, 2x Shock Mount Extenders, Installation Hardware, Installation Instructions, and Supreme Suspensions Pro Pack. Does not include U-Bolts. TECHNICAL NOTES: 3 inch front suspension lift 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 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.