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The K&N 57i Generation II cold air intake for Ford Focus II ST (2.5L turbo; 2005–2009) replaces the factory air path with a roto-molded non-metallic tube to lower intake temperature and reduce restriction, translating into increased airflow and usable power. It pairs with a washable, reusable High-Flow filter and carries K&N’s Million Mile Limited Warranty. Easy installation is typically under 60–90 minutes; check CARB status where applicable.
K&N Performance Intake Kit FORD FOCUS II ST 2.5L 20V TURBO
