Thread: First Installed Akrapovic Titanium Exhaust M5 in the US!
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      10-09-2018, 07:14 PM   #4
shayan30
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Drives: F90 M5
Join Date: Jul 2013
Location: USA

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Originally Posted by scotty91ss View Post
Very nice, congrats, and thanks for sharing.
What does it sound like closed valves?
The first couple of rev's are with them closed.
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