Crawford Performance Air Oil Separator V3 STI 2008-2021 w/ TMIC

Crawford Performance Air Oil Separator V3 STI  2008-2021 w/ TMIC

Crawford Performance Air Oil Separator: The Subaru Original

• Not a Catch Can - Closed Loop and Maintenance Free

• Consume Less Oil

• Extend the Life of your Engine

• Reduce Detonation and Risk of Engine / Ringland Failure

• Reduce Fuel Dilution and Subsequent Power Loss

New Dual Chamber (V3) Features:

• Our Latest technology - Not seen anywhere else and Patent Pending
• Double Labyrinth Chambers increase efficiency
• Does not delete Smog Component - Utilizes OEM PCV System
• Worldwide Compatibility: Fits on RHD Vehicles
• No Coolant Line = Easier Install

Oil pooling in your intake? Stop the oil from ever getting there with the Crawford Air Oil Separator.

The Crawford Performance Air Oil Separator (AOS) is the original solution to Subaru's notorious oiling system issues. Although the technology was pre-existing with other vehicle brands such as Porsche, Crawford Performance is the inventor of the first system specifically for Subaru. No other AOS on the market employs the same technology.

Want to know more about how an Air/Oil Separator works and why you need one? 

Click here to check out our FAQ blog on the technology inside. 
There you can also find a full fitment list for all current versions and kits.

Note: more V3 fitment options are currently in R&D. Is your car or application unavailable? Click here to check our V2 Kits, which have the widest range of fitments. 

*Note: Due to the fact that the AOS bracket connects to the TGV housing, this kit is not compatible with aftermarket TGV housings. 

*Note: This system was designed on USD models. Not compatible with all PCV systems across the world and may require some additional components to properly install.

Install Instructions

2008 - 2016 STI
     PDF
     Video

2017+ STI
     PDF
     Video