Thread: 640i GC quad exhaust tips look
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      09-11-2019, 04:02 PM   #2
doggboy
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Drives: BMW 650i
Join Date: Jul 2019
Location: san diego

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While not specifically for the 640, this was the best info I could find on the subject. https://www.6post.com/forums/showthread.php?t=1424300

It looks like you just need the M6 diffuser and some short Y tips.
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