2015-2018 Focus ST RS Racing Intake OEM Upgrade HP Factory Box Filter 2015-2018 Focus ST RS Racing Intake OEM Upgrade HP Factory Box Filter
Let your Focus ST out of the box with this factory RS upgrade. Better sound and power with no modification needed, simply remove your stock air-box and insert this heat shielded unit in its place. I installed this unit into my personal ST in about 20 minutes.
Also check out our RS Factory short shifter listed on our page! We know STs and know what the community needs!
Listing and template services provided by inkFrog