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Message: <blockquote data-quote="Stangbangin" data-source="post: 198616" data-attributes="member: 8633">e7 to ported e7 - 5-10 hpported e7 to gt40- 10gt40 to ported gt40- 10-15I only dyno'd my car after I got the ported e7's and then the ported gt40's, but had both sets of heads unported with stock cam. gt40's are a good head don't get me wrong, BUT you have to be a pretty good driver to cut some good times. I would opt for the gt40p's if you go that route I keep finding them cheap just no use for them and maybe even find a ported set. I have head the gt40p's outflow the gt40's. You could be in the 12's with those mods but you have to practice driving even if its an auto.</blockquote>