BMW M3 Forum (E90 E92) - View Single Post - Removing secondary cats + resonators on stock exhaust= ?

J08M3 · 08-27-2009, 05:56 PM

one mod I did previously was Eisenmann Sport with secondary cat delete. The exhaust became slightly louder and much more aggressive with no added rasp. My suggestion is leave the resonator.

08-27-2009, 05:56 PM	#7
J08M3 Major General 285 Rep 6,007 Posts Drives: 2011 M3 COUPE Join Date: May 2008 Location: NEW YORK iTrader: (8)	one mod I did previously was Eisenmann Sport with secondary cat delete. The exhaust became slightly louder and much more aggressive with no added rasp. My suggestion is leave the resonator. __________________
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