Certain original equipment exhaust manifolds warp and crack due to lower-grade iron construction. This Dorman OE FIX replacement is made of high-grade ductile iron that better handles heat and stress for greater durability. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Ford Expedition: 2005, 2006, 2007, 2008, 2009] - [Ford F-150: 2004, 2005, 2006, 2007, 2008, 2009] - [Ford F-250 Super Duty: 2005, 2006, 2007, 2008, 2009] - [Ford F-350 Super Duty: 2005, 2006, 2007, 2008, 2009] - [Ford Lobo: 2004, 2005, 2006, 2007, 2008, 2009, 2010] - [Lincoln Mark LT: 2006, 2007, 2008] - [Lincoln Navigator: 2005, 2006, 2007, 2008, 2009]