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Old 11-27-2010, 09:52 PM   #4
nickp51chevy
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Join Date: Aug 2008
Location: Snohomish, wa
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Re: SO lets design a new exhaust....

I would say no more than 2 1/2" for the 307, but with an almost 400hp; at least 3" pipes.
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1970 Chevy CST C10 long box 350/400
2008 Chevy Silverado short box 4x4

Had;
1951 Chevy short box 307/T5
1988 Chevy shot box 4x4 350/350
1971 Chevy C10 long box 4x4 350/350
1971 Chevy C20 long box 350/350
1971 Chevy C10 long box 350/350
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