Thread: HFC or X-pipe
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      04-16-2010, 07:16 AM   #12
J08M3
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Quote:
Originally Posted by m33 View Post
the xpipe includes the primary cats , no
well on OEM it does since it's all one piece, but not on the aftermarket systems. Most of the aftermarket x-pipe have you either take off the primary cats, or they have you cut the exhaust behind them and bolt on to them.
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