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      03-27-2013, 02:59 PM   #16
dd1981
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Drives: 2012 335i sport
Join Date: Dec 2010
Location: Chicago

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Quote:
Originally Posted by MMOTION View Post
Sorry to bring this off topic, but what is that black module attached to the drivers side exhaust pipe?

That is the actuator that opens and closes the butterfly valve.
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