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
Ford Focus RS | Sound & Power with K&N Air Filter - YouTube
13-18 Focus ST 2.0L K&N Replacement Air Filter
K&N Replacement Air Filter for Focus RS (E-2993)
K&N Air Filter Ford Focus II 2.5L (05-09) Performance Replacement - 33 – Redline360
Definitely recommend the K&N filter for "sound reasons" : r/FordFocus
K&N E-2993 Focus Air Filter Replacement ST 2013-2018/RS 2016-2018
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
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
K&N Drop-In Air Filter, 2013-18 Focus ST/16-18 Focus RS, Air Intake: Store Name
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 Engine Air Filter: High Performance, Premium, Washable, Replacement Filter: 2008-2011 FORD (Focus), 33-2401 - Walmart.com
&N Replacement Air Filter: Ford Focus ST
Add 9 HP to 2012 to 2016 Ford Focus with Simple to Install K&N Air Intake System
K&N Air Filter Ford Focus II 2.5L (05-09) Performance Replacement - 33 – Redline360
K&N 57S Style Replacement Filter - Focus RS Mk3 - Collins Performance
K&N Performance Air Intake System Ford Focus 2002-2004 2.0L 4-Cyl | 69-3511TR
KN Filters | Ford Focus MK2 + MK3 | Inlegfilter | Autosport Mebu
K&N 57S Air Filter Induction/Intake/Airbox Kit For Ford Focus RS Mk3 - 57S-4000 | eBay
K&N - Replacement Air Filter - Ford Focus C-Max 1.6 & 1.8 Oe Size 281M X 190Mm - Enjuku Racing Parts, LLC
K&N Air Filter Ford Focus 1.0L/1.5L L3 / 1.5L/2.0L/2.3L L4 (18-22) Per – Redline360
