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      03-10-2010, 09:23 PM   #10
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Originally Posted by bame_E92 View Post
Does anyone know the best way to up the noise on the 2009 E92 OEM exhaust? I want to keep the stock exhaust so I'm just looking for something to add that extra roar. I heard of some kind of valve that can be installed but I'm not sure exactly what it's called. Any suggestions?
It's called an exhaust cut out valve...

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