Quote:
Originally Posted by Yoyoniner
How about drone? Reports are that the Akra gets rid of any drone. What about the Dinan?
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Quote below is from
http://www.bmwblog.com/2016/03/04/di...ressive-sound/
Quote:
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The new Dinan Free Flow exhaust system has been designed to improve exhaust flow by reducing backpressure. This results in increased power output and really improves the tone characteristics of the 4.4 liter engine without making it overly loud. Dinan utilizes a Helmholtz chamber that works to reduce exhaust drone on the freeway.
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But I would love to hear real world experience on this point if anyone has a Dinan exhaust system on their X5m and can chime in...