Quote Originally Posted by FFR428
Also on the tunnelport heads....in stock trim there is no flow gain over .600. They flow 292-300ish as cast. Ported maybe 320-340 although some claim more. I'd also like to know what cam they used besides what head, intake work was done. I do agree those numbers seems a bit high.
If those flow numbers are correct there would be enough head to support 575 to 600 hp in theory.