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what do stock heads flow? what do ported heads flow? what kind of power gain did you get to the tires?

i am getting ready to do heads/cam to my 6.1 Hemi and would like to see what the 5.7 guys have gotten as far as gains.

fyi - the dynatech headers didnt do much for me. this is a sign that the stock srt8 exhaust manifolds are pretty darn good.
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