Killer Bee Air Oil Separator 08-14 Subaru Impreza WRX & 08+ STI / 05-09 OXT / 05-09 LGT

This Killer B air/oil separator uses centrifugal airflow to pull liquid oil and oil mist out of the crankcase gases, then returns the collected oil to the engine. This version is packaged specifically for 2008-2014 WRX, 2008-2021 STI, and listed Legacy GT/Outback XT applications.

Why I would use it: I would use this on a street, track, or higher-output turbo Subaru when I want a self-draining system that controls oil vapor while preserving the engine's crankcase ventilation capacity.

• Turbo-inlet vacuum helps evacuate crankcase gases under boost
• Collected oil drains back to the crankcase
• Open centrifugal design uses no filter media in the airflow path
• Billet and TIG-welded 6061-T6 aluminum construction
• Application-specific hoses, fittings, and mounting hardware

Fitment: 2008-2014 WRX / 2008-2021 STI / 2005-2009 Legacy GT / 2005-2009 Outback XT