Quote:
Originally Posted by krnnerdboy
I agree! But you'll have to upgrade to a 650 or m diffuser to make it work. Luckily it's just a bolt on item
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Will both M6 and the 650 diffusers fit a 640i Msport GC? If so, which one is the better choice if you simply want to change the stock exhaust tips from dual to quad (no other exhaust changes).