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RX-BMW · 05-15-2013, 10:59 AM

1. AR downpipe has no drone and no smell
2. Even catless the COBB AP deletes the codes...so why would you remove the dp?
3. Mix some 91 octane with some E85 if avail and make a monster.
my two cents.

05-15-2013, 10:59 AM	#15
RX-BMW Second Lieutenant 18 Rep 268 Posts Drives: 2009 135i sport package 6AT Join Date: Aug 2010 Location: St. Louis iTrader: (0)	1. AR downpipe has no drone and no smell 2. Even catless the COBB AP deletes the codes...so why would you remove the dp? 3. Mix some 91 octane with some E85 if avail and make a monster. my two cents.
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