COBB Air/Oil Separator for 2015-2020 WRX (843615) M&H This part was discontinued by

This part was discontinued by Seibon in 2025 and we have none remaining in stock

so the install kit is also available separately without a battery

Better performance

Other 3-Port boost control solutions don't facilitate the proper use of the turbo inlet's recirculation port

and laser etched

COBB Air/Oil Separator for 2015-2020 WRX (843615) M&H This part was discontinued byThe COBB Air Oil Separator or AOS for 2015 2020 WRX is placed within your crankcase ventilation system and helps to prevent oil vapors from being introduced into the intake system. Vehicle Fitment: 2015 2020 Subaru WRX Shipping Times: Generally ships in 2 3 weeks. At times, these may not be available for immediate shipment requiring fabrication or powdercoat. Features: 1 Liter Holding Capacity Integrated ORB Ports Compact Cast Aluminum Body w Black