Porting DC Stage IV iron heads

PRH said
Nowadays, all one has to do for a pair of nice flowing, cnc ported 906 heads is make a call to Dave at KG engines in Kansas Ohio.
He’ll fix you right up for a very reasonable price.

My days of high effort ported factory iron are over!!

I’m right with you. I probably turn down 2-3 porting jobs monthly because of them being cast iron.