Cummins 5.9 Fire Ring Machining and Head Porting By Bias Boring the Valve Ports Unusual Mill Setups

In this video I have to take a bunch off the deck of A Cummins 5.9L Cylinder Head in order to convert it from C-rings to fire rings. I also do some updated head porting by boring the bowls of the ports to get the exhaust and intake heading in the right directions. This is a delicate process that requires careful attention since this is still a wet head and taking a bunch of material out of it is a risk to go thru into the coolant jacket. Hopefullly it is gains and not Junk I wind up with! Stunt milling at its finest I hope you enjoy!