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Old 10-20-2020, 05:52 PM   #1
CARZ1968
Bowties from Birth
 
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Join Date: Jan 2008
Location: Chester County PA
Posts: 86
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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