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Re: question/trivia (archive)
[ Follow Ups ] [ 3-series (E36) Message Board ] [ Msg. Board FAQ ]
Posted by aquilles325 on June 11, 2000 at 22:56:07:

In Reply to: question/trivia posted by Victor at Vandy on June 11, 2000 at 21:57:40:

It is called a butterfly valve and is there just too reduce exhaust noise when accelerating from a standstill. It opens up once your up to speed.

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