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3inch exhaust reduced?
My 99 c2500 came with 3inch exhaust to the muffler then it reduced to a single 3 inch exhaust. would switching to a dual 3inch outlet with dual 3 inch turndowns give me the best gas mileage/ performance? Should I add reduced turn downs (2.5 inch) instead of the 3"s? Looking to add a cold air kit, performance mass air flow and a program in the future.
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68 K10 Burb aka "da bomb"
72 C10 SWB Highlander
97 30th anniv. Z28 Conv
99 Chevy Crew 454
11 Traverse AWD
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