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I think people just tell you things to make you buy the more expensive parts
ExactlyQuote:
He said that after head/cam work, the difference gets bigger
ask him for a dyno graph to compare the difference...he won't be able to produce one
The difference could maybe be 10 HP on a bored / stroked all out race engine. When you get to that point, why not have a set of custom stepped headers fabricated? More power and less money still!!!