Radium Air Oil Separator - 2015+ WRX

Radium Air Oil Separator - 2015+ WRX

High-powered modified Subaru engines tend to generate excessive blow-by oil and gasses. In these cases, an ordinary small catch can may quickly fill with oil and not be adequate. The Radium Engineering Subaru  AOS (Air Oil Separator) kit is responsible for keeping blow-by oil and other pollutants out of the intake pipe, manifold, turbocharger, and intercooler during all engine loads. The main difference is that an AOS system returns what is collected back into the oil pan so there is no servicing required.  The built-in heater keep water from condensing in the AOS, making sure ONLY oil is returned back to the oil pan, not a milky sludge.


-Effectively raises the octane and increases engine performance with cleaner inlet air 
-Prevents oil buildup in the intake or intercooler system walls, throttle body, intake manifold, etc. 
-Lowers hydrocarbon emissions


What is included?

-Machined aluminum Radium Engineering Air/Oil Separator

-Specially designed mounting bracket

-All necessary SAE J30R7 rated PCV/Emissions hose-Coolant hoses and fittings-PCV delete fitting

-All necessary aluminum fittings and hose-ends

-Stainless steel mounting hardware

-20-0255 Master Cylinder Brace **Can be optioned out if you already have it



2015+ WRX

2014+ FXT