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J08M3 · 06-15-2009, 10:53 PM

You need to cut the OEM pipes because they are one piece from resonator up to headers.

But by leaving your stock primary cat you definitely won't get a CEL and you will pass inspection

06-15-2009, 10:53 PM	#13
J08M3 Major General 286 Rep 6,007 Posts Drives: 2011 M3 COUPE Join Date: May 2008 Location: NEW YORK iTrader: (8)	You need to cut the OEM pipes because they are one piece from resonator up to headers. But by leaving your stock primary cat you definitely won't get a CEL and you will pass inspection __________________
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