Answer
Nov 12, 2025 - 08:42 AM
Ford didn’t start using 20mm dowel pins until engines built after January 2006. If your 2003-early 2006 6.0L Powerstroke was built before that, it likely uses 18mm dowel pins. If you accidentally order the wrong size Sinister Diesel Head Stud and Gasket Combo Kit, don’t sweat it—we’ll get you squared away.
