Anybody port and polish their head yet? Any insight on this. Reason im asking is because I can have the work done for free.

 

Evo head flows alot better then the old DSM 4g63s but I sure there is a advantage to porting the head.

 

A good port job will give you decent gains....But a bad one can also get you bad results.......

Flow rate, velocity and turbulence are all things that can be altered through a port and polish.

I would wait until some larger shops in the us start messing around with their heads and come up with a good amount of research before you just let someone dig into a very expensive head.