Designed to level out your Ford F-150, the Rancho rear lift block kit raises the rear an additional 1.5-in. to accommodate larger wheel/tire combinations. Product Features:COMPATIBILITY -- Designed for Chevrolet Silverado 1500 and GMC Sierra 1500 trucksLIFTS AND LEVELS -- Raises the rear of the truck an additional 1.5-in. to level out the entire vehicle (aftermarket bumpers, winches, etc. affect lift height)FITS LARGER TIRES -- Allows the use of larger wheel/tires without body or fender modifications (tire size varies by manufacturer)EASY TO INSTALL -- Kit includes two rear blocks, four coated U-bolts and eight nuts that install easilyRESISTS CORROSION -- Zinc-coated hardware resists rust and corrosionCOMPLETE PERFORMANCE UPGRADE -- Transform your suspension with a Rancho LEVEL IT system, Rancho quickLIFT, performance upper control arms, Rancho RS9000XL or RS5000X rear shocks, sold separately, see Rancho catalog for details