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Amazon.com: K&N Engine Air Filter: Increase Power & Acceleration, Washable, Premium, Replacement Car Air Filter: Compatible with 2008-2013 BMW M3, E-2994 : Automotive
2000-2006 BMW M3 Air Filter Replacement (2000, 2001, 2002, 2003, 2004, 2005, 2006) - iFixit Repair Guide
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