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Old 03-28-2012, 09:13 PM
v8power v8power is offline
Officially Welcomed to the 'Fest
Location: IL
Join Date: Oct 2011
Posts: 259
Mein Auto: 2013 550xi M-sport
So basically the exhaust flap NEEDS vacuum for it to be open(louder)?

I remember doing this to my old 335i which has the dual exhaust. But one exhaust had the flap that if I disconnect it (no vacuum) it will open to be louder.
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