MAZDASPEED3 INTAKE + AIRBOX GEN1 MAZDASPEED3 2007-2009MAZ00201IA DESCRIPTION The C. A. R. B certified COBB Tuning SF Intake removes a pre turbo restriction in the stock intake system and produces an increased snarl from your engine while letting you hear the turbo spool more clearly. The SF Intake and Airbox utilize several unique features in an effort to maintain optimal airflow and cooler charge air temperatures. The CFD designed velocity stack and air flow straightener grid ensure smooth air flow