Head Porting is a definit help I am trying to designs for head one called high velocity and other one that was supplied to me from a performance dealer from over seas. So far I have installed the newly designed heads from across the pond and they do help immensly. Especially through the whole power band and not just on top end. I have taken this motor to 12,000 rpm so far with good results. I will try my high velocity head porting next week hopefully it will be the same.

Head porting does help!!!!