Thread: Air Filter Replacement 2011 X3
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      08-29-2011, 07:00 PM   #11
Radioactive
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Drives: '11 X3 28i '10 535i '04 325i
Join Date: Mar 2011
Location: San Diego

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IMHO The performance increase with a K & N filter is not that great, compared to the hassle it could bring.
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