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Re: Exhaust systems
Actually, Dual 3" is wayyyy to big for your 400! For 3" duals you better be paicking a big, big block at over 500hp.
http://www.exhaustvideos.com/faq/how...pipe-diameter/
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90 Chevy Suburban 2500 5.3 swap/th400/np241/14bltSF/10blt.
77 C20 crew cab Silverado. 396/th400. In work.
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