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I have mentioned this a few times on a few threads, Stock mufflers FLOW, there is nothing wrong with them for PERFORMANCE reasons, Sure they are ugly and heavy but they FLOW. There is no way muffler delete can give to any DECENT HP gains!!
-bobby
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2017 ZL1 M6 Bog City, 2013 ZL1 M6, 2010 2SS M6
ZL1::J-E-T-S JETS JETS JETS
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