Radium Engineering Air Oil Separator (AOS-R) Kit 2015-2021 Subaru WRX, 2014-2018 Forester XT - 20-0258-00

Radium Engineering 20-0258-00 Air Oil Separator (AOS-R) kit for the 2015-2021 Subaru WRX and 2014-2018 Subaru Forester XT (LHD).

• Improves inlet air cleanliness and engine performance
• Helps prevent oil buildup in the intake, intercooler, throttle body and intake manifold
• Built-in heater and integrated water trap
• CNC-machined sections sealed with O-rings and fully disassemblable for cleaning
• Returns collected oil to the oil pan, so no servicing is required
• Height 6.3 in (without fittings), diameter 3.45 in, capacity 20.3 oz (600 mL)
• Inlet, outlet and return use 7/8-14 threads for 10AN ORB fittings; coolant ports use 7/16-20 threads for 4AN ORB fittings (x2)

Included

• Machined aluminum AOS-R assembly
• Specially designed mounting bracket
• SAE J30R7 rated PCV/emissions hose
• Coolant hoses and fittings
• PCV valve 10AN adapter fitting
• All necessary aluminum fittings and hose ends
• Stainless steel mounting hardware
• Brake master cylinder brace

Fitment

• 2015-2021 Subaru WRX (LHD). (Source: Radium Engineering)
• 2014-2018 Subaru Forester XT (LHD). (Source: Radium Engineering)

Resources

• Radium Engineering product page
• Radium installation instructions (PDF)

Contact us if you are unsure of fitment or Size HERE