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  #89  
Old 10-05-2012, 06:54 AM
nguyendot nguyendot is offline
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Location: Oklahoma USA
 
Join Date: Apr 2012
Posts: 9
Mein Auto: 2008 528i
Quote:
Originally Posted by Metalcolt View Post
I have an '08 M-Sport 550i and checked behind the drivers rear tail light; no solenoid or vacuum lines. Also, exhaust is always comming out of both pipes.
Yeah it seems the M-Sport just leaves it wide open 100% of the time. Still not loud at all compared to my dual magnaflows on the last car.
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