BMW M3 Forum (E90 E92) - View Single Post

MilehighM3 · 12-15-2012, 08:21 PM

The Dinan x pipe does not have cats, which may be causing the AFR issue. Too much back pressure for the tune. Those are decent numbers for the altitude, try living even higher than that! Not to mention we only get 91 octane...

12-15-2012, 08:21 PM	#20
MilehighM3 Brigadier General 915 Rep 3,456 Posts Drives: Harrop E90 M3 Join Date: May 2011 Location: Colorado Springs iTrader: (14) Garage List 2009 E90 M3 [6.50]	The Dinan x pipe does not have cats, which may be causing the AFR issue. Too much back pressure for the tune. Those are decent numbers for the altitude, try living even higher than that! Not to mention we only get 91 octane...
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