Fitment Information

• Scion FR-S LHD (2012, 2013, 2014, 2015, 2016)
  
• Toyota GT86 LHD (2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021)
  
• Subaru BRZ LHD (2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020)

Specifications

Dimensions

• AOS-R Height: 6.3" (without fittings)
  
• AOS-R Diameter: 3.45" Round 
  
• AOS-R Capacity: 20.3 oz (600mL)

Ports

• Inlet: 7/8"-14 threaded for 10AN ORB fittings
  
• Outlet: 7/8"-14 threaded for 10AN ORB fittings
  
• Return: 7/8"-14 threaded for 10AN ORB fittings
  
• Coolant: 7/16"-20 threaded for 4AN ORB fittings (x2)

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

What's Included?

• Machined alumium Radium Air Oil Separator
  
• Specially designed mounting bracket
  
• SAE J30R7 rated PCV/Emissions hose
  
• Coolant heater hoses and fittings
  
• All necessary aluminum fittings and hose-ends
  
• Stainless steel mounting hardware 
  

Product Description

High-powered modified Toyota 4U-GSE and Subaru FA 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. Like the Radium Engineering Dual Catch Can Kit, the AOS-R (Air Oil Separator-Return) 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-R system returns what is collected back into the oil pan (as shown below) so there is no servicing required. The built-in heater keeps water from condensing in the AOS-R. And because water is more dense than oil, there is an integrated water trap found around the bottom perimeter of the can.