Air Oil Separator for 2002-2024 Subaru WRX / 2004-2021 Subaru WRX STI by Perrin
The PERRIN Air Oil Separator removes oil vapors from crankcase gases before they reach the intake manifold. Its ceramic-coated, CNC-machined design reduces carbon buildup and supports engine health.
Crankcase blow-by, made up of oil particles and air, is recirculated into the intake. The PERRIN Air Oil Separator captures the oil before it reaches the intake tract, which helps limit carbon buildup in the valves and combustion chamber. Reducing this buildup helps avoid power loss and lowers wear and tear on the valves.
The PERRIN Air Oil Separator uses two internal airflow methods to remove oil from blow-by. The swirling airflow pulls oil particles out of the air, and the internal grooves, curves, turns, and holes create impact points that catch additional oil for efficient separation.
Features
- Ceramic Coated for Maximum Durability
- Custom Crankcase Fitting
- Durable Aluminum Connectors, Not Plastic
Benefits
- Reduce Carbon Buildup
- Advanced Airflow Separation
- Warmed for Proper Vapor Separation
