03-06 6.0L CNC Fab 18mm Stage 1 Cylinder Head Set - 421020

CNC 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-ringed to prevent head gasket failure
All new intake and exhaust valves
All new springs, retainers, keepers, and seals
Hardened valve seats to resist wear and cracking
Vacuum checked to ensure proper valve seat sealing
No core return required
Free ground shipping