OEM P/N#: BC3Z-12A342-B
This is the correct glow plug needed for 6.7L Powerstroke's that have a WHITE insulator above the hex nut, and the measurement from the hex nut to the seat of the glow plug is 91mm.
Due to the possiblity of engine or head changes please verify that your engine does not have ORANGE insulators on the tip if the glow plug, if it does, you will need Motorcraft part number ZD18.