Diamond Advantage Upper Engine Gasket kit including 18mm Head Gaskets. 
 
High-quality parts that meet or exceed OE specs
Backed by Navistar
No-risk and hassle-free core return
Comprehensive two-year unlimited mileage warranty on parts with labor coverage for professional installers
Check fitment before ordering. 20mm dowels were used on trucks with a build date from Jan 11, 2006 and onward.