BMW 3-Series (E90 E92) Forum - View Single Post

c_jeong89 · 12-12-2010, 10:16 PM

i assume you're talking about the secondary cats? if you are screw it and gut them out u don't need O2 sensors.

12-12-2010, 10:16 PM	#5
c_jeong89 Banned 85 Rep 2,097 Posts Drives: E90 TiAg Join Date: Feb 2009 Location: Irvine/Bay Area iTrader: (16)	i assume you're talking about the secondary cats? if you are screw it and gut them out u don't need O2 sensors.
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