Shock Extender KitFor 4WD Only. Ford F250 2005-2007 4WD Super Duty. Ford F250 2005-2007 4WD. Ford F350 2005-2007 4WD Super Duty. Ford F350 2005-2007 4WD. Featuring 100% bolt-on installationt. The leveling kit systems will not affect your factory OEM ride quality or comfort level.