BMW M3 Forum (E90 E92) - View Single Post - HFC or X-pipe

ryan@ActiveAutowerke · 06-14-2010, 11:48 AM

Replacing the primary with the HFC you will receive more power than having stock cats but eliminating the cats completely will give you the most power but a bit of a exhaust smell since there will be no cats.

06-14-2010, 11:48 AM	#22
ryan@ActiveAutowerke Lieutenant 39 Rep 431 Posts Drives: M3 Join Date: Jun 2009 Location: Miami, FL iTrader: (0)	Replacing the primary with the HFC you will receive more power than having stock cats but eliminating the cats completely will give you the most power but a bit of a exhaust smell since there will be no cats.
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