Radium Engineering 2013+ Subaru BRZ / Scion FR-S Air Oil Separator-Return Kit (rad20-0351)

This is the Radium Engineering 2013+ Subaru BRZ / Scion FR-S Air Oil Separator-Return Kit. Part rad20-0351. Oil system parts such as catch cans, separators, baffles and coolers keep oil where it belongs and control oil vapor in the intake.

A high powered modified engine tends 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. Like the Radium Engineering Catch Cans, the AOS (Air Oil Separator) kit is responsible for keeping blow-by oil and other pollutants out of the air intake and intercooler (if equipped) systems. The main difference is that an AOS system returns collected oil back into the oil pan so there is no servicing required.

IMPORTANT INSTALLATION NOTES:

In order for the AOS to function properly, a port must be supplied on the engine for the oil to return through.

The AOS must be mounted high enough in the engine bay so that the port on the bottom is higher than the oil return port on the engine.

Engine coolant must be available to be routed to AOS in order facilitate heating it so that it functions correctly.

Without a properly designed AOS, water condensation can develop and find its way in the oil pan contaminating engine oil. Engine coolant lines are routed through the Radium Engineering AOS in a specially designed heating chamber. This keeps the AOS warm and prevents water from condensing inside.

For AOS crankcase plumbing, the valve cover vent(s) are routed into the top inlet where the stainless steel condensing material separates the oil from the gasses. The filtered liquid oil is collected at the bottom of the AOS and drawn into the oil pan. Meanwhile, the clean crankcase air can either be vented to atmosphere (VTA) or recirculated to the turbo air inlet pipe.

With a properly operating system, the fluid level inside the AOS will be empty after sitting. If there is a possible return obstruction, simply unscrew the anodized billet aluminum dipstick for inspection. Conversely, the entire billet unit disassembles into 3 large pieces for servicing.

Features and 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 AOS
• Anodized universal mount that permits 360deg rotation
• Two 5/16" barbed fittings for coolant lines
• Stainless steel hardware
• Ports
• Top Port: 7/8"-14 threaded for 10AN ORB fittings

Product details

• Part type: Oil Catch Cans & Oil System
• Brand: Radium Engineering
• Radium Engineering part number: rad20-0351

Fitment

• Vehicle: Scion FR-S, Subaru BRZ (2013-2021), Toyota GT86
• Years and trims on file: 2013-2016 Scion FR-S Base; 2013-2017 Subaru BRZ Limited; 2013-2017 Subaru BRZ Premium; 2015 Subaru BRZ Series.Blue; 2016 Subaru BRZ Series.HyperBlue; 2017 Toyota 86 Base
• Application listing: Radium Engineering 2013+ Subaru BRZ / Scion FR-S Air Oil Separator-Return Kit
• Check the vehicle, model years, engine and trim above against your car before ordering. Not sure? Ask us and we will check it against your VIN.

Shipping & returns

• Orders are processed within 1–3 business days; standard delivery is 3–7 business days within the United States.
• Radium Engineering parts are supplied through our distributor. We confirm availability and lead time with you after you order.
• We currently ship within the U.S. only. See our Shipping Policy.
• 30-day returns on unused parts in original packaging — see our Return Policy.

Installation at Team ANBD

Team ANBD is a performance shop in Andover, New Jersey. We can align or corner-balance the car, and prep track cars. Book an appointment or ask us about installation and fitment before you order.