7159 Green Filter High Performance Cylindrical Air Filter Green Color – FSWERKS
Green Filter 7159 Focus/Focus ST High-Performance Air Filter (10-18)
AIRTEC Motorsport Induction Kit for Ford Focus Mk4 1.0 and 1.5 EcoBoost - AIRTEC Motorsport
MST Performance Indcution Kit for 1.5 EcoBoost Ford Focus - Automotive Air Filters | Ramair Filters
2019+ Ford Focus MK4 1.5T Cold Air Intake System(FO-MK401) - MST Performance - Intake & Cooling | WOT Motorsport
Ford Focus MK4 1.5L EcoBoost Aluminum Alloy Cold Air Intake - ARMASPEED
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
mountune High Flow Air Filter [Mk8 Fiesta | Puma ST]
How To Change Engine Air Filter 2013-2020 Ford Fusion 1.5L Turbo Filter Replacement EcoBoost - YouTube