Description
Improve engine protection and crankcase ventilation with the COBB Tuning Air Oil Separator (AOS) for select 2004–2007 Subaru WRX and Subaru STI models. Designed to help manage oil vapor generated by the engine’s crankcase ventilation system, the COBB Air Oil Separator helps separate oil from blow-by gases before those gases are recirculated through the intake system.
During spirited driving, high engine loads, and performance-oriented use, oil vapor can travel through the factory crankcase ventilation system and contribute to oil residue in the intake tract. An air oil separator helps capture and return separated oil to the engine, supporting cleaner intake plumbing and helping reduce the amount of oil vapor entering the intake system.
Developed for Subaru performance applications, the COBB Tuning Air Oil Separator is a valuable upgrade for enthusiasts who want to improve crankcase oil management while maintaining a practical setup for street driving and performance use. It is suitable for Subaru WRX and STI owners looking to complement other engine upgrades with improved oil vapor separation.
Before purchasing, verify the exact vehicle application, engine configuration, installation requirements, and included components with COBB Tuning to ensure compatibility with your specific Subaru.
Key Features
- Brand: COBB Tuning
- Product Type: Air Oil Separator (AOS)
- Helps separate oil from crankcase ventilation gases.
- Helps reduce oil vapor entering the intake system.
- Supports improved crankcase oil management during performance driving.
- Designed for select Subaru WRX and STI applications.
- Suitable for performance-oriented street and modified vehicle setups.
- Exact installation requirements and included hardware should be confirmed before purchase.
Fitment
- 2006–2007 Subaru WRX
- 2004–2007 Subaru STI
Fitment Note: Confirm the exact year, model, engine configuration, and product revision before ordering. Verify compatibility with any existing engine modifications or aftermarket crankcase ventilation components.
