| Year | Make | Model |
|---|---|---|
| 2007 - 2023 | Nissan | GT-R |
| 2003 - 2014 | Subaru | Impreza |
| 2008 - 2014 | Subaru | Impreza WRX STI GR Sedan |
| 2003 - 2020 | Subaru | Legacy |
| 2003 - 2026 | Subaru | Outback |
| 2014 - 2026 | Subaru | WRX |
| 2014 - 2021 | Subaru | WRX STI |
| 2014 - 2021 | Subaru | WRX VA |
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COBB V3 Air/Oil Separator (AOS) 1L w/ ORB Ports | Subaru WRX/STI/Legacy/Outback/Forester XT (05-21) (822615)
COBB V3 Air/Oil Separator (AOS) 1L w/ ORB Ports | Subaru WRX/STI/Legacy/Outback/Forester XT (05-21) (822615)
SKU:822615
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$595.00 USD
Regular price
$595.00 USD
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▶ Vehicle Fitments
The COBB V3 Air/Oil Separator (AOS) is a precision-engineered performance component designed to reduce crankcase oil vapor recirculation in Subaru engines. Developed in partnership with IAG Performance, this AOS features a compact cast aluminum body with a durable black powdercoat finish and offers a 1-liter holding capacity. Integrated ORB ports enhance fluid management, while the separator effectively prevents oil vapors from entering the intake system, which can degrade fuel octane and cause carbon buildup. This design improves engine efficiency and longevity by maintaining cleaner intake air and reducing oil contamination.
This Air/Oil Separator is compatible with multiple Subaru models, including the 2008–2014 WRX, 2008–2021 STI, 2005–2009 Legacy GT, 2005–2009 Outback XT, and 2009–2013 Forester XT. It serves as a direct replacement or upgrade for the factory PCV system, suitable for street and performance driving applications. Installation is straightforward with integrated ports designed for seamless integration into existing vacuum and breather lines. The COBB V3 AOS is ideal for enthusiasts seeking improved engine reliability and cleaner operation across a range of Subaru turbocharged platforms.
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Overview
Overview
COBB Air / Oil Separator (AOS)
Fitment: 2008-2014 WRX, 2008-2021 STI, 2005-2009 Legacy GT, 2005-2009 Outback XT, 2009-2013 Forester XT
Part #: 822615
Overview
The COBB Air/Oil Separator (AOS) is a precision-engineered performance drivetrain component designed to improve the efficiency and longevity of your Subaru engine. It helps prevent crankcase oil vapors from recirculating through the intake system, which can degrade fuel quality and contribute to oil and carbon buildup over time. Developed in partnership with IAG Performance, this AOS is ideal for Subaru enthusiasts seeking to maintain engine cleanliness and optimize performance reliability.
By capturing and separating oil vapors before they reach the intake, the COBB AOS supports cleaner combustion and helps preserve the effective octane rating of your fuel. This makes it a valuable upgrade for drivers who want to protect their engine’s internal components while supporting consistent performance under various driving conditions.
Key Features
The COBB Air/Oil Separator offers a range of features engineered for durability and functionality:
- 1 Liter holding capacity to efficiently trap oil vapors and prevent re-entry into the intake
- Integrated ORB ports for versatile hose routing and easy installation
- Compact cast aluminum body with a durable black powdercoat finish for corrosion resistance and long-lasting use
- Designed specifically for multiple Subaru models, ensuring proper fitment and compatibility
- Helps reduce carbon buildup and oil contamination in the intake tract
- Supports improved fuel quality by maintaining higher effective octane levels
- Developed in collaboration with IAG Performance, reflecting high engineering standards
Installation & Fitment
The COBB AOS is designed for direct fitment on specified Subaru models, making installation straightforward for experienced enthusiasts and professional installers alike. Fitment should be verified against your vehicle’s model and year to ensure compatibility. The integrated ORB ports provide flexible hose connection options to accommodate various engine bay layouts.
