Originally Posted by unreal
8 rib and direct drive. Currently 2.85" upper and a 7.25" lower. Need to goto a 8.0"/3.15". Elevation also kills boost, and my heads are huge so that lowers boost. They flow 410+cfm and I have a big nasty cam. With stock heads/cam it would be 20+ easy.
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which heads do you have? my heads are pretty decent but i have a mild cam..