M5POST - BMW M5 Forum - View Single Post - Downpipes? Cat-Back? Or both..

TheRedBaron · 03-30-2014, 03:03 AM

I'm going to start with a catted downpipe, and go from there.

RPI sounds unreal..

03-30-2014, 03:03 AM	#8
TheRedBaron Flying Ace 3 Rep 46 Posts Drives: F10 M5 Join Date: Oct 2010 Location: Orinda, CA iTrader: (0)	I'm going to start with a catted downpipe, and go from there. RPI sounds unreal..
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