Tomioka Racing

Tomioka Racing Air & Oil Separator Subaru (TR-AO1000)

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Tomioka Racing Air & Oil Separator for Subaru 

The air and oil separator is a must have unit for all Subaru engines! Constructed from high-quality aluminum, this handy unit will help you lower emission, keep the intake charge pipe clean, reduce the oil burned in the engine and reduce the detonation due to a dirty intake charge pipe. Tomioka Racing AOS is compatible with factory PCV system, and it drains oil into the factory oil pan automatically. 


  • Easy to install with less hoses and hardware needed
  • Easy twist-off cap, no tools needed to open cap
  • Equalizes pressure from crank case to cylinder heads
  • Compact & light-weight design to save space 


  • Subaru Impreza WRX / STi 1993-2012
  • Subaru Forester 1998-2011
  • Subaru Legacy 1990-2011

Important Note: This item is not vehicle specific. It is compatible with a wide range of applications and is therefore displayed on our site regardless of your vehicle selection. Please review the specifications and verify compatibility prior to placing your order.

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