Ford Focus Forum, Ford Focus ST Forum - View Single Post - K&N Drop-In/Stock Housing Lid
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Old 11-06-2012, 02:32 PM   #26
dududu
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Quote:
Originally Posted by amoosenamedhank View Post
The AEM is a cone opposed to K&N's cylinder so the filter's surface area will be smaller. Both filters have a 6.25" base diameter, but the aem tapers to 5.25".

So the lid should fit.
Is the AEM dryflow filter linked here a drop-in replacement for the stock air filter, the way that the K&N is?
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