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      01-10-2013, 12:40 PM   #11
bernard54321
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Drives: 2009 328I E90
Join Date: Dec 2012
Location: l.a. california

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2009 328I E90  [0.00]
Quote:
Originally Posted by Speedwagon View Post
What???
its a valve that opens or closes to bypass the muffler... ive been toying with the idea but im not sure i want to go that far....