COBB Tuning Air Oil Separator Black/Red

2008-2014 Subaru WRX / 2008+ Subaru STI

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SKU: 822615We price match!

In Stock


  • Prevents harmful oil and vapors from entering the intake system
  • Prolongs the life and performance of the engine
  • Co-developed with IAG Performance
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COBB Tuning Air Oil Separator Black/Red


  • Black and red finish option
  • 1-liter holding capacity
  • Integrated ORB ports
  • Compact cast aluminum body with a black powder-coated finish
  • Heat shielding on the crankcase breather and oil return lines
  • Designed with a coolant bleeder valve
  • Bespoke COBB color combination
  • Laser-etched COBB logo
  • Co-developed with IAG Performance
  • Port connections from the AOS to the cylinder head and to the top of the block
  • The bottom of the canister is shaped like a snail which redirects positive crank pressure into the same swirl pattern produced by the 3 side ports which allows for maximum oil drainage while separating oil from the air in all of the venting ports
  • The backplate of the AOS features a unique coolant routing system that heats the entire AOS to the same temperature of the engine which maximizes the evaporation of any water collecting inside of the can 
  • Includes hardware, hoses, and the fittings



The COBB Tuning Air / Oil Separator Kit has been designed to be placed within your vehicle's crankcase ventilation system to prevent harmful oil vapors from entering your intake system. This can affect gas mileage, cause detonation, and have an overall effect on your performance. This particular AOS kit has been co-developed with IAG performance to provide you with a quality AOS kit that produces results. A great preventative maintenance upgrade that will prolong the life and performance in the engine of your Subaru. 



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