GrimmSpeed Red Air Oil Separator 2002-2007 WRX / 2004-2021 STI

DESCRIPTION This is the GrimmSpeed Air Oil Separator. If you're familiar with modifying your vehicle, then you will know the importance of an air/oil separator, especially in a boxer-designed engine. The GrimmSpeed separator comes with a unique design as it utilizes the factory oil filler cap location to maintain your PCV system while separating the harmful oil and vapors from the crankcase, as well as the head ventilation system. This will prevent oil from coating the intake manifold which will make can make its way onto the valves which will affect the octane rating which leads to detonation issues and performance issues.  WHY? Prevent oil from mixing into your intake manifold and ventilation systems with the GrimmSpeed Red Air Oil Separator. Take care of your engine by adding this component to your vehicle to prevent harmful oil from getting to places it shouldn't be. FEATURES: Anodized red finish option with white GrimmSpeed logo The unique design utilizes the factory oil filler cap location to maintain your PCV system Includes all of the required fittings Includes hose that is cut to specific lengths and zip ties Easy installation COMPATIBILITY 2002-2007 WRX 2004-2021 STI