Thread: Exhaust
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      11-23-2013, 12:11 AM   #1
Spencer25
2015 M4 Coupe, Black Sapphire
United_States
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Drives: 2013 F13 M6; 2015 F25 M4 Demo
Join Date: Feb 2013
Location: Orange County, CA

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Exhaust
What is the difference between the RPI GTM exhaust and just taking the mufflers off the stock BMW F13 exhaust?

I really wish my M6 came with a louder exhaust for a $140k car
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