4.6 ported heads
 

Has anyone seen or have any of the heads from "www.Powerheads.com".

The claims on the horsepower gains seem too good to be true.

must be for a blower !!
 

I looked at that site and for what they are asking in price they could do a little more porting. Now for the 65rwhp gain and the 100rwhp , that must be will a blower . I think you would see more like 45 to 60 if your lucky !! There is a dealer on this site DTA Racing & Preformance that have a head swap kit that is p/p for 1,500.00 and I have only heard good things about this company.
And from what I hear he has a package with the intake and heads p/p , and thats around 3,500.00 and thats all new parts .
So check it out and if you get a set up on your stang please put a post on here with your gains , I would like to see how much gain you got , I am saving for the head swap my self !!!