05-19-2020, 09:45 PM | #26 |
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Drives: 2014 M6 Grand Coupe CP
Join Date: May 2017
Location: Kingwood TX
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when the exhaust flap opens, you already have a "muffler delete". other than the sound, there is probably not much in it for most stages of tune.
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F06 M6 Grand Coupe CP
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