COBB SF Intake Replacement Intake Filter Subaru ModelsExperience optimal performance with the COBB Tuning SF Intake Replacement Intake Filter for Subaru Models. This system features a custom conical cloth filter for direct airflow and optimal intake velocity. Compatible with Stage 1 and Stage 2 Off The Shelf mapping with the AccessPORT ecu tuning, it uses CFD designed velocity stack and a unique filter element to reduce turbulence and maintain optimal airflow.