Precision Works AOS Air Oil Separator - Subaru WRX 2015-2021

The Precision Works air oil separator removes oil from the engine ventilation system before it can be pulled into the intake. Unmitigated oil entering the intake can lead to detonation, which is detrimental to engine health. Order your AOS today and help your engine run at its best!

Features:

• Retains OEM PCV valve
• Engine runs cleaner and more efficiently
• Precision CNC machined
• 6061 billet aluminum
• High quality continental hose
• Includes fittings, caps, and zip ties
• Wrinkle red or wrinkle black finish
• Compact cast aluminum design
• 1 liter holding capacity
• Integrated ORB ports
• Aluminum body powder coated in red wrinkle finish
• Three -8 ORB removable billet hose barbs