09D HVF Performance Cone Filter [Focus RS/ST Mk3]

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Product Overview The 09Design Performance Air Filter is a high flow, dry element replacement for the OEM filter found on some of the most popular performance Focus models, includin g the Mk2 Focus RS, Mk3 Focus ST and Mk3 Focus RS. Designed to improve airflow into the engine while maintaining excellent filtration efficiency, this panel filter supports sharper throttle response and long term reliability without the drawbacks of traditional oiled filters. Show more