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Discussion Starter #1
on my Audi, which was a V6, the exhaust came out both sides at all times it seemed...not with the 540? just figure I'd ask...
 

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Discussion Starter #4
wonder if we can plug the vacuum line, assuming there is one, to have it open all the time for sound purposes. I did this on our 2010 335is and it sounds so much more throaty now - just unplug the line and stick a golf tee in it. no error or issues at all
 
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