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      01-01-2013, 01:32 AM   #17
donaldt
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Drives: M135i
Join Date: Aug 2012
Location: Hong Kong

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yea I missed how they did it on my Z4 3.0, I simply removed some foams in the duct and the car was growling
however I think the problem is that on the Z4, there was some nice engine noise just not enough of it
as for on the M135 there was nothing nice about the engine noise so they had to generate some
but I would expect BMW engineering to come up with a smarter solution than this