I love it when guys say stage 6 heads will only put out 600 horsepower. I'll have to tell my Friend that run 9's in his street legal Duster. LOL Trust me, in the right hands they will surpass that number.
The 469" enginemasters entry made over 700hp, those heads had some interesting work done to them. If I remember right they flowed about 330cfm before Dwayne tweaked them after I sold them to Jim.
