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well if a guy on here made 570 hp on a low deck,with eddys and manifolds how much can you be losing 40hp over headers it wont be much. i want to retain the stock look, not a race car, show car. im sure it will run better than tired, heavy 906s

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I'm guessing that is a heavily modified enigine. And the Main's were "hogged" out some. I don't think they up-grade on a stockish 440-6 would be the same. You'd probably add more HP by getting a set of headers.

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It was a 470" engine , nothing real exotic in the build, flat tappet cam, the manifolds were AS CAST ...

so you think a pair of headers is going to gain as much as changing from a set of heads that flow maybe 220 at .500 to a pair of heads that flow 280 plus at .500 ???

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