ReadyLIFT Suspension has engineered a 3.5"lift kit made to fit the 2011-16 Ford F250/F350/F450 SuperDuty 4WD trucks with a two-piece drive shaft that allows wheel and tire combinations up to 37" while keeping the smooth OEM ride and drivability. This is a complete lift kit including 5" OEM equivalent rear blocks with integrated bump stop landings 3.5" coil spring extensions with sound isolators an OEM-style panhard drop bracket front bump stops carrier bearing spacer OEM shock extension brackets a pair of radius arm drop brackets and all needed hardware. When used with the maximum size tires the F250 truck body is raised over 6". ReadyLIFT's 3.5" SST Fixed Lift Kit System for the 2011-16 Ford F250/F350 4WD Super Duty trucks is a safe easy way to lift your Super Duty while maintaining your factory ride. Why spend thousands of dollars for an elaborate mega-lift kit that takes extensive time to install while destroying your ride when you can save money and get a great lift height that rides great and looks awesome! ReadyLIFT Smart Suspension Technology is used to make this kit very user friendly to install requiring no cutting or drilling. Like all other ReadyLIFT kits the F250/F350 3.5" SST Lift Kit is guaranteed for life against manufacturing defects. NOTE: For use with trucks with a one-piece drive shaft. NOTE: The lift blocks in this kit are not designed to work with aftermarket or factory add-on air spring/load leveling kits that attach to the bump stop tangs. Use of this type of air bag system will void all block warranties and can cause failure of the block bump stop tang. Diesel engines only. Gas engine trucks will sit nose high.