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      10-19-2010, 03:21 PM   #18
dtc100
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Drives: 2011 E90 328i 6AT non-sport
Join Date: Sep 2010
Location: Norcal

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Posted this Q in DIY but got no response, after comparing the pictures of the stock airbox and the BMW PI box, I see the only difference is one split opens, the latter opens from the top, of course the PI has a cone filter.

Did anyone attempt to retrofit a cone filter into a stock airbox? I know someone mentioned the Dinan ram filter kit, am asking if anyone tried a DIY.
Appreciate 0