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sjr-sooner · 05-13-2019, 03:35 PM

Does anyone know is the Performance Exhaust (z10) that you can get from the factory as an option adds any horsepower or is it purely for sound?

Also how it compares the the competition package?

Thanks.

05-13-2019, 03:35 PM	#1
sjr-sooner Private First Class 42 Rep 119 Posts Drives: 2018 M6 GC Frozen White Comp Join Date: Apr 2016 Location: Allen, TX iTrader: (1)	M6 GC Competition Pkg vs Perfomance Exhaust Does anyone know is the Performance Exhaust (z10) that you can get from the factory as an option adds any horsepower or is it purely for sound? Also how it compares the the competition package? Thanks.
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