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what size exhaust would be enough for a twinscrewblown 340 at about 14pounds of boost ? small solidroller 242/[email protected] .570/.576 lift ported edelbrock heads and 1 7/8" primary headers on ethanol 3" or 3½" borla or magnaflow? i want straight thru but not sure if the packing in...

anyone having any ide of how much an X pipe can quiet down a 3" exhaust with 40series flowmaster deltaforce mufflers? i know it makes more power and that stuff but right now i am mostly looking for any ideas to make the car a litlle more quiet without destroying that beutifull sound of Big cam...