• Designed specifically for ETS Focus RS Intake Kit • K&N filters for high - performance replacement • Model SP - 3717, a perfect fit! Upgrade your Ford Focus with these amazing replacement filters now!

These air filters are great for daily driving or high - performance racing of your Ford Focus. They're perfect for car enthusiasts who want to improve their vehicle's performance. The SP - 3717 filters are sized to fit the ETS Focus RS Intake Kit precisely.