BMW ALPINA B3s exhaust flap does work.

B3Sのエキゾーストフラップ、動画撮影に成功しました。 詳細は、「みんカラ」で!

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BMW ALPINA B3S exhaust flap does not work, after vacum pipe repaired.
BMW ALPINA B3S Exhaust flap does not work,after vacum pipe repaired.

BMW E36 328i exhaust silencer flap operation

e90, e92, e93 BMW Exhaust Flap Rattle Fix for more! This happens to a large amount of these cars. If you drive a e90, e92, e93 or maybe other ones, this will definitely help you at one point. This mod also makes your Exhaust sound very nice (a tiny bit louder)

Capristo RS5 exhaust flaps