03-06 6.0L CNC Fab 18mm Stage 1 Cylinder Head Set - 421020 TJ This simple yet effective kit

This simple yet effective kit will bolt into the factory locations with no modifications

The key components of the shock hoops are prefabbed for ideal fitment

making it suitable for small to medium-sized projects

The lower activation temperature allows coolant to flow through the engine earlier

1977-1982 Ford F-100 Custom 1977-1978 Ford F-100 Northland 1977-1981 Ford F-100 Ranger 1978-1981 Ford F-100 Ranger Lariat 1977-1981 Ford F-100 Ranger XLT 1982-1983 Ford F-100 XL 1982-1983 Ford F-100 XLS 1977 Ford F-100 XLT 1982-1983 Ford F-100 XLT Lariat 1976-1978

03-06 6.0L CNC Fab 18mm Stage 1 Cylinder Head Set - 421020 TJ This simple yet effective kitCNC Fabrication Model 421020 Upgrade your 03 06 6. 0L Powerstroke with these CNC Fabrication, LLC stage 1 stock replacement o ringed cylinder heads. CNC Fabrication Stage 1 stock replacement 18mm dowel cylinder heads for 2003 2006 6. 0L Powerstroke. FEATURES: In house Machined on our Sunnen seat & guide machine to exceed OEM specifications using the latest tooling Brand new upgraded castings to prevent areas known in the factory heads from cracking O