ReadyLift 66-2011 2.5" Stage 1 Leveling Kit for Ford F350 / Super Duty 2011-Up Easy way to level your F350 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; professional installation time is estimated at 2 hours;guaranteed for life against manufacturing defects Fits single rear wheel trucks only Allows for up to a 35 inch tire; easy installation; will never wear, break or fail, keeps your factory ride Designed specifically for the 2011 Ford Super Duty trucks