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      01-17-2013, 10:09 PM   #23
Blah blah blah
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Drives: M3
Join Date: Jun 2007
Location: PA

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I had this installed at ACM about a month ago and I have zero complaints. It's loud when I want to enjoy the sound and quiet enough to not bother me at other times. Drone is definitely subjective. I would say drone is minimal, so little that when I was on conference calls for almost two hours while driving between 60 and 75, no one noticed until I deliberately went WOT at the end of a call. If I had to guess, I would say ACM does this mod with no exhaust leaks and that's why drone is not an issue. Jay has done over a hundred of these and it shows in the quality of the cuts/welds.
Ian 2009 e90 MT
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      01-27-2013, 06:05 PM   #24
Second Lieutenant

Drives: M3,335,750Li,X5,X3
Join Date: Mar 2011
Location: Long Island New York

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Has anyone went to the dealer with this done? If so what did they say or do?
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