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      07-05-2014, 01:46 PM   #147
amoeba
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Drives: E46 330i zhp, F30 335-MSport
Join Date: Jan 2010
Location: Fremont, CA

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It's possible and other ppl have done it in another thread. The difference was minimal and can barely be heard in the cabin. The part cost about $190 from oem outlets.

Others have simply drilled holes to achieve the same thing. Airflow is not as efficient without the airhorn design but probably doesn't make much difference.
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