Thread: N52 exhaust pipe carbon build up
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      05-31-2017, 07:40 AM   #4
cpie168
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Drives: 2010 E90 328i 6MT ZSP BSM
Join Date: Mar 2014
Location: K/W and GTA, Ontario, Canada

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I have the same thing on my exhaust tips. Is that not the way it's supposed to be?
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