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      02-05-2012, 11:15 AM   #60
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Join Date: Mar 2005
Location: VA

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Originally Posted by KevinJ View Post
The exhaust is not that loud unless wide open throttle and from the interior its subdued. BMW puts a little valve control on the exhaust to close off one of the pipes unless you hit wide open throttle. At start-up however both pipes are open for emission control reasons. This is regardless of the model.

Some people prefer a little noise than whisper quiet. This one sounds like what I hear every morning:
I thought it was the opposite. I thought the valve was closed during startup to allow the cats to heat up faster.
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