Cobb Subaru's Air Oil Separator (822615)
The COBB Air/Oil Separator is a vital component in your Subaru's crankcase ventilation system, effectively preventing the introduction of oil vapors into the intake system. Developed in collaboration with IAG Performance, the COBB Air Oil Separator boasts exclusive features designed to enhance its performance and effectiveness.
The Subaru EJ engine has 3 ports that vent crank pressure: one on each cylinder head and another on the top of the block. Each engine vent port receives its own connection to the AOS. By giving each engine port its own entrance to the AOS we have allowed for more effective and faster excavation of crankcase pressure. Additionally, this reduces overall system pressure. With a 4" OD and 5.75" height, the AOS has an approximate 1-liter holding capacity. The larger the AOS, the more power you can safely make without having to worry about the AOS overfilling.
The bottom of the AOS is shaped like a snail, redirecting positive crank pressure into the same swirl pattern produced by the 3 side ports. Allowing maximum oil drainage while separating oil from the air in all the venting ports.
The back plate of the AOS features a unique coolant routing system that heats the entire AOS to the same temperature as the engine. This maximizes the evaporation of any water collecting inside the can. The hotter the AOS, the less water will collect inside and mix with the oil.
NOTES
- 50 State Legal.
This part is legal for sale and uses on Emissions Controlled Vehicles in all 50 states when used in accordance with the manufacturer's application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number: D-660-25, D-660-45
APPLICATIONS
- FORESTER XT (2009, 2010, 2011, 2012, 2013)
- LEGACY GT (2009, 2010, 2011, 2012, 2013)
- OUTBACK XT (2005, 2006, 2007, 2008, 2009)
- WRX (2008, 2009, 2010, 2011, 2012, 2013, 2014)
- STI (2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021)
FEATURES
- 1 Liter Holding Capacity
- Integrated ORB Ports
- Compact Cast Aluminum Body w/ Black Powdercoat Finish
- Heat Shielding on Crankcase Breather and Oil Return Lines
- Coolant Bleeder Valve
- Bespoke COBB Color Combination
- Laser Etched COBB Logo
- Compact Cast Aluminum Tank Design
- Bespoke COBB Anodizing on Caps
- Wrinkle Black Powder Coated Canister
- Laser Etched COBB Logo
- Developed in Partnership with IAG Performance
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WARNING: Operating, servicing and maintaining a passenger vehicle or off-highway motor vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to www.P65Warnings.ca.gov/passenger-vehicle.
Cobb Subaru's Air Oil Separator (822615)
