CNC Fabrication 18mm Stage 2 Cylinder Head Set 03-06 Ford 6.0L Powerstroke

The CNC Fabrication 18mm Stage 2 Cylinder Head Set is built for Ford 6.0L Power Stroke engines with 18mm head locating dowels. CNC Fab starts with new castings reinforced in areas where factory heads commonly crack. Each head is O-ringed to help the head gasket maintain a combustion seal under high cylinder pressure. Both heads come fully assembled with Inconel intake and exhaust valves for high-temperature operation. CNC Fab pairs them with USA-made Stage 2 valve springs matched for consistent seat pressure, then vacuum-tests each head to verify that the valves seal against their seats. FEATURES & BENEFITS: Four-angle valve job performed in-house on Sunnen seat and guide equipment Hardened valve seats resist wear, cracking, and recession O-ring grooves machined on CNC Fab’s Hurco milling center New valve retainers, keepers, and seals installed Inspection sheet included with measured dimensions and tolerances Sold as a pair with no core return required Fitment note: For 6.0L Power Stroke F-250, F-350, F-450, F-550, Excursion, and E-Series applications equipped with 18mm locating dowels. Ford changed to 20mm dowels during 2006. Verify the dowel size on your engine block before ordering, especially on a 2006 model or a vehicle with a replacement engine.