BMW M3 Forum (E90 E92) - View Single Post - Challenge Street mid + M performance catback. Anyone?

M3Denver · 03-21-2013, 09:10 AM

Rasp not to to bad with just test pipes however you can notice it at times. I will be putting some resonators on it this week along With overpriced o2 sensor replacement fml! I'll let you know the result.

03-21-2013, 09:10 AM	#12
M3Denver Lieutenant 21 Rep 420 Posts Drives: 2011 BMW M3 Join Date: Mar 2012 Location: Denver CO iTrader: (0)	Rasp not to to bad with just test pipes however you can notice it at times. I will be putting some resonators on it this week along With overpriced o2 sensor replacement fml! I'll let you know the result.
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