K&N Performance Air Intake System Ford Focus 2002-2004 2.0L 4-Cyl | 69-3511TR
Amazon.com: K&N Engine Air Filter: Reusable, Clean Every 75,000 Miles, Washable, Replacement Car Air Filter: Compatible with 2007-2019 Ford/Lincoln/Volvo (C-Max Escape, Grand, Kuga, Focus, Tourneo, MKC), E-2993 : Automotive
K&N Drop-In Air Filter, 2013-18 Focus ST/16-18 Focus RS, Air Intake: Store Name
Ford Focus RS Drop In Replacement High-Flow Air Filter by K&N
K&N Ford Focus ST Typhoon Performance Intake — Panda Motorworks
K&N Drop-In Air Filter, 2013-18 Focus ST/16-18 Focus RS, Air Intake: Store Name
&N Replacement Air Filter: Ford Focus ST
Recambios del sistema de admisión de aire y gasolina para coches E-2993 K&n Filtro de aire se ajusta Ford Focus III 2.0 TDCi 2010-2013 Piezas y accesorios para motor LI4476322
Ford Focus Air Intake
Definitely recommend the K&N filter for "sound reasons" : r/FordFocus
K&N air filter - Ford Focus Club - Ford Owners Club - Ford Forums
Amazon.com: K&N Cold Air Intake Kit: Increase Acceleration & Engine Growl, Guaranteed to Increase Horsepower up to 10HP: Compatible with 2.0L, L4, 2012-2018 Ford Focus, 69-3517TS : Automotive
Amazon.com: K&N Cold Air Intake Kit: High Performance, Guaranteed to Increase Horsepower: 50-State Legal: Fits 2005 FORD (Focus)57-2559 : Automotive
K&N - Replacement Air Filter - Ford Focus C-Max 1.6 & 1.8 Oe Size 281M X 190Mm - Enjuku Racing Parts, LLC
Installing a K&N High Flow Air Filter on my 2016 Ford Focus ST - YouTube
K&N Filter with Generic Air Intake system For 2012-2018 Ford Focus 2.0L 4Cyl | eBay