Quote:
Originally Posted by GannyCy
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).
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The M6 diffuser will not fit non-M (M-sport or standard) bumpers. You'll need to get the 650 M-Sport diffuser if you want to run quad tips on your 640 M-Sport.