Amazon.com: K&N Cold Air Intake Kit: Increase Acceleration & Engine Growl, Guaranteed to Increase Horsepower up to 33HP: Compatible with 2.3L, L4, 2016-2018 FORD (Focus RS) 69-3539TB : Automotive
BLAU Ford Focus RS Oil Change Kit - 5W-50 Ford Focus RS Oil Change 2.3L Ecoboost
GO-PARTS Replacement for 2007-2018 Ford Focus Air Filter (RS / S / SE / SEL / ST / Titanium) - Walmart.com
UPR Single Valve Catch Can for 2016+ Ford Focus RS – TunePlus, Inc
Motorcraft Oil Filter FL-400S - Ford Focus/Escape/Transit Connect/Fies – FSWERKS
2016-2017 Ford Focus RS Air Intake - (Dry Filter w/ Shield) Wrinkle Red [2.3T] - Injen SP9003WR