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Fen335i · 07-16-2012, 11:47 AM

Does anyone know the diameter of the OEM xpipe, well to be exact the pipe diameter just past the primary cats where it butts up to the headers? Is that 2 1/2 inches?

07-16-2012, 11:47 AM	#1
Fen335i Captain 107 Rep 805 Posts Drives: e92 M3 / X5d / Z4 M Roadster Join Date: Jun 2008 Location: Pacific Northwest iTrader: (0)	Diameter of oem xpipe Does anyone know the diameter of the OEM xpipe, well to be exact the pipe diameter just past the primary cats where it butts up to the headers? Is that 2 1/2 inches?
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