Quote:
Originally Posted by sochermit
Finally did the tee mod with a tie. How do I tell if the tie is sufficient? I know, or at least I believe, the tee mod keeps the flapper open all the time. Would there be a time, maybe just after starting the car, that the flapper would normally close?
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Yes. After (cold)start up the flapper will close and the exhaust will get quieter. IF you have the new anti tuner SW from BMW this happens at about 30 seconds. IF you have the original SW it happens after about two minutes.
With the vacuum line pinched the exhaust should stay loud all the time.
Dack