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      03-31-2016, 08:04 PM   #3
m3_tristan
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Drives: 2011 E90 M3
Join Date: Jul 2014
Location: Toronto

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Quote:
Originally Posted by mwtrogus View Post
Front section dual pipes on N55 motor are 2.5 inches, then larger when it merges to the single pipe rear section/muffler.

Not sure if you want N55 or N20 info...
The N20, I'm doing a muffler delete and want to order tips
Appreciate 0