X-Head Porting....

IMO. If i was looking for the best out of those heads. I'd find someone with a CNC program for them. Practice on something else first... It's not as easy as you think.

Not the best, just a little more flow from the xheads. I'm not allowed to spend money for a while, so can't buy aluminum heads right now...

Yea im practicing on the heads above that I posted. 2 different sets of 1.88/1.60 heads.