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      05-03-2013, 11:21 AM   #38
metrickid
Dinosaur supervisor
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Drives: E91 318d
Join Date: Feb 2007
Location: Autobahn

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Quote:
Originally Posted by shivaswrath View Post
Surprised it retains the stock sound levels...
It is BMW approved (sold by BMW dealers here and retains full warranty) so it uses a valve as the OEM system (plugs in to the same connection) so the cruising speed where they measure retains stock level but improved sound. It will open up more when accelerating.
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