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The COBB Air Oil Separator is a direct-fit catch can for 2013–2018 Ford Focus ST models. It isolates oil and crankcase vapors from the intake tract, helping to reduce oil contamination and buildup in the intake system. As a vehicle-specific air‑oil separator, it provides a simple upgrade or replacement for stock breathers during routine service or tuning modifications.
Cobb 13-18 Ford Focus ST Air Oil Separator
