Thread: 650I W/ competition m5/m6 mufflers vs non competition sound comparison
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      07-04-2017, 03:40 PM   #3
doughboy650gc
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Drives: 2013 650i grand coupe
Join Date: Aug 2016
Location: massachusetts

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not really sure.. can't see why anyone would pay extra for a competition Muffler just for black tips and still end up buying bigger tips to fill the quad opening....
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