|  These are 5 layer MLS head gaskets with elastomer coating. Embossment shapes are designed to improve durability. This Part Number is for 2003-1/10/2006 18mm Dowel motors. Any motor built after 1/11/2006 will require a 20mm Dowel Head Gasket which we also offer. Product Highlights: • Improved durability • Reduced oil consumption • Improved engine performance • Reduced bore distortion • Includes Left and Right Side Fitment Guide: 2003, 2004, 2005, 2006, 2007 F-250, F-350, F-450, F-550, and Excursion with the 6.0L Powerstroke. This includes XL, XLT, Limited, and Eddie Bauer |