Grimmspeed Air Oil Separator (Red) - Subaru STI VA Electronic Please Note: NOT Compatible with

Please Note: NOT Compatible with Ethers (MTBE

Program Oil Temperature Warning (outer LED

Improved braking over OE pads

The Clutch Masters FX200 is recommended for the STI with a little more than just basic bolt-ons

Eliminate Front-to-Back Slop in Stock Shifter

Grimmspeed Air Oil Separator (Red) - Subaru STI VA Electronic Please Note: NOT Compatible withFits 2015+ Subaru STI An Air Oil Separator has one job, remove the oil from the engine ventilation system so the oil does not get sent through the intake system. The GrimmSpeed AOS is unique as it allows you to maintain your PCV Valve while separating the oil out of the crankcase and head ventilation air! Our AOS will allow your engine to run more efficiently due to the separation of oil from the intake system. When there is oil in your system, the