Thread: K&N for 335d
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      07-17-2011, 09:34 AM   #9
ChiDiddy
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Drives: pop smoke
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i agree. Oiled filters like K&N have caused gummed up MAF's and stuck idle air control valves on my older cars. Its not K&N only, but Injen and other oil-based filters. i've switched to dry flow filters like AEM. They seem thicker and filter better. Gauze-type seems too porous.
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