Description

High-powered modified Subaru engines tend to generate excessive blow-by oil and gasses. In these cases, an ordinary small catch can mayquickly fill with oiland not be adequate. Like the Radium Engineering Subaru Dual Catch Can Kit, the 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 thatan AOS-“R” system “returns” what is collected back into the oil pan so there is no servicing required.The built-in heater keeps water from condensing in the AOS.And because water is more dense than oil, there is an integrated water trap found around the bottom perimeter of the can. This prevents water from descending into the oil pan if ever present. Furthermore, because the water is trapped against the heater, it will eventually boil and evaporate out of the system. The AOS is constructed of three CNC machined sections that screw together and are sealed with O-rings.

Applications:

(20-0207-02)
02-07 Subaru Impreza WRX
02-07 SubaruImpreza WRX STi
04-08 SubaruForester XT
05-06 Saab 9-2X Aero

(20-0207-08)
08-14 SubaruImpreza WRX
08-14 SubaruImpreza WRX STi

(20-0607)
15-19 SubaruWRX STi

NOTE: For 2015+ SubaruWRX (non STi) go HERE.

Measurements:

AOS Height: 6.94″ (top of dipstick to bottom of AOS)
AOS Diameter: 3.45″ Round
AOS Capacity: 20.3 oz (600mL)

Benefits:

-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

Included:

• Machined alumium Radium Engineering Air Oil Separator
• Specially designed mounting bracket (see note at bottom of page)
• All necessary SAE J30R7 rated PCV/Emissions hose
• Coolant hoses and fittings
• All necessary aluminum fittings and hose-ends
• Stainless steel mounting hardware

20-0207-02

20-0207-08

20-0607

*For 02-05 Subarus with a cable-actuated throttle body, ourCruise Control Relocation Bracketmust be used.
*If operated in freezing environments, Radium Engineering recommends installing insulation sleeving (not included) over any hose exposed to cold air flow. This will help prevent the natural phenomenon of water condensation freezing and potentially clogging the hose.
*For RHD vehicles, ourUniversal AOS-Rmust be used for custom mounting and plumbing.
*The Radium AOS-R kit may not be compatible with all other aftermarket products.