K/N Drop-In style Air-filter for the Ford Focus RS is designed to boost horsepower and rate of acceleration. Can be cleaned and used again and again. Simple installation and High air flow with exceptional filtration. Lasts up to 50,000 miles before cleaning is required depending on driving conditions. Works with original equipment manufacturer vehicle electronics Emissions legal in all 50 US states. Million Mile Limited Warranty. Cleaning Kit available here.
APPLICATIONS: (ALL) 2016+ Ford Focus RS