Was the exhaust note increased noticeably with just the Xpipe from the C6 with the OEM mufflers? Also do you have any idea on how to get the exhaust flaps to stay open always? Thanks
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2013 X6 50i Sapphire Black
2012 550x Alpine White
- 12.727@108 - 1.7 60ft lemon'd
2011 550i Sapphire Black
- 12.960@109 - lemon'd
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