E-2993 K&N Air Filter fits FORD FOCUS RS ST 2.0 2.3 2.5 & VOLVO V40 S40 V70 24844199775 | eBay
K&N Air Filter Ford Focus II 1.4L/1.6L/1.8L/2.0L L4 (03-07) Performanc – Redline360
Amazon.com: K&N Cold Air Intake Kit: Increase Acceleration & Engine Growl, Guaranteed to Increase Horsepower up to 7HP: Compatible with 2.0L, L4, 2013-2018 FORD (Focus ST), 69-3518TS : Automotive
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K&N Performance Air Intake System Ford Focus 2007-2009 2.0L 4-Cyl | 69-3513TTK
Amazon.com: K&N Engine Air Filter: High Performance, Premium, Washable, Industrial Replacement Filter, Heavy Duty: E-9289 : Automotive
K&N Filter with Generic Air Intake system For 2012-2018 Ford Focus 2.0L 4Cyl | eBay
Ford Focus 2.0L PZEV Receives Extra 5.83 HP with K&N Typhoon Air Intake System
K&N 13 Ford Focus ST L4-2.9L F/I Typhoon Performance Intake – BoltMotorsports
&N Replacement Air Filter: Ford Focus ST
K&N 69-3518TS Focus Cold Air Intake Typhoon Kit ST 2013-2018
2013+ Ford Focus ST owners – we have a drop in K&N air filter for you in stock! – ModernPerformance.com Blog
K&N Engine Air Filter: High Performance, Premium, Washable, Replacement Filter: 1998-2008 FORD (Tourneo Connect, Transit Connect, Focus, Focus ST170, Focus SVT), 33-2819 - Walmart.com
33-2877 K&N Air Filter - Fits 2003-2007 Ford Focus
K&N 57S Air Filter Induction/Intake/Airbox Kit For Ford Focus RS Mk3 - 57S-4000 | eBay
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
2004 Ford Focus SVT 2.0L L4 Gas Air Intake
Amazon.com: K&N Cold Air Intake Kit: Increase Acceleration & Engine Growl, Guaranteed to Increase Horsepower: Compatible with 2.5L, L5 2005-2011 FORD ( Focus XR5, Focus II), 57I-2503 : Automotive
Installing a K&N High Flow Air Filter on my 2016 Ford Focus ST - YouTube
Ford Focus RS | Sound & Power with K&N Air Filter - YouTube
K&N Focus Drop-In Filter (00-04 Zetec) 33-2819
&N Replacement Air Filter: Ford Focus ST
K&N Replacement Air Filter Ford 2.0L 4-Cyl | 33-2401
