ReadyLift 69-2531 3.5" Front/1.0" Rear Stage 4 SST Lift Kit for Ford F350 Super Duty 2011-Up Easy way to level your Super Duty while maintaining your factory ride; 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 Allows for up to a 37 inch tire; easy installation; will never wear, break or fail, keeps your factory ride Professional installation time is estimated at 3-4 hours