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Amazon.com: A-Premium Engine Air Filter Cleaner Box Housing [fits DOHC 4Cyl 2.0L, PZEV] Compatible with Ford Focus 2008-2010 Coupe, 2008-2011 Sedan, Replace# 9S439C662AB, 9S4Z9600C : Automotive
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Dorman 258-519 Air Filter Housing for Specific Ford Models Fits select: 2005-2007 FORD FOCUS - Walmart.com
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Amazon.com: Air Filter Housing - Compatible with 2005-2007 Ford Focus 2.0L 2.3L 4-Cyldiner : Automotive
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Ford Focus Series (07-18) DNA Air Filter R-FD16H21-01 - DNA Increased Air Flow +49.07%, DNA Filtering Efficiency 98-99% - FRD-FCS - DNA Filters - Product Details
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Dorman 258-519 Air Filter Housing for Specific Ford Models Fits select: 2005-2007 FORD FOCUS - Yahoo Shopping
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Ford decided to be special and make an air filter unit with a replacement part that costs $200. Made my own for $30 of parts and some tape. : r/techsupportmacgyver
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