Tomioka Racing Air Oil Separator Subaru WRX / STI 2002-2007

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.

Features:

• 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

Part Number: TR-AO1000