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n55co · 11-13-2018, 04:39 AM

OPF/GPF is the same as cat-back, as the M2C dosent have secondary catalytic converters.
axle-back = just rear muffler exchange
cat-back = midpipe and rear muffler exchange

11-13-2018, 04:39 AM	#3
n55co Private First Class 41 Rep 118 Posts Drives: G80X BSM Join Date: Apr 2013 Location: Germany iTrader: (0)	OPF/GPF is the same as cat-back, as the M2C dosent have secondary catalytic converters. axle-back = just rear muffler exchange cat-back = midpipe and rear muffler exchange
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