BMW 3-Series (E90 E92) Forum - View Single Post - exhaust break-in, myth or reality

rsjames · 10-07-2008, 05:59 PM

Yes, the Borla will change tone after a month or two. In my case, as long as I keep it above 2500RPM, there's no drone.

10-07-2008, 05:59 PM	#9
rsjames Private First Class 2 Rep 122 Posts Drives: 07 335i Montego Blue Join Date: Mar 2007 Location: Orange County, Calif. iTrader: (0)	Yes, the Borla will change tone after a month or two. In my case, as long as I keep it above 2500RPM, there's no drone.
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