Perrin Air Oil Separator Kit V1 (AOS) Neon Yellow w/ FMIC 2002-2014 WRX / 2004-2021 STI / 2005-2009 Legacy GT / 2005-2009 Outback XT | Swirl Pot Technology | Engine Protection & Efficiency
Overview
The Perrin Air Oil Separator Kit V1 is designed to protect your Subaru’s intake system by effectively separating oil from crankcase blow-by gases. Unlike traditional catch cans, this AOS returns the separated oil back to the engine, eliminating the need for frequent maintenance. It is an essential upgrade for Subaru WRX, WRX STI, Legacy GT, and Outback XT owners who want to reduce carbon buildup, improve intercooler efficiency, and maintain consistent engine performance.
Engineered with a multi-layer swirl pot design, the separator forces blow-by gases to rapidly move across internal baffles, maximizing oil separation. The base plate is heated by engine coolant, matching the temperature of the blow-by gases to minimize condensation inside the unit. This thoughtful engineering ensures reliable operation in all driving conditions and extends the life of your intake components.
By reducing oil deposits in the intercooler and intake tract, the Perrin AOS helps maintain optimal airflow and combustion quality, lowering the risk of detonation and power loss. This kit is a practical and durable solution tailored specifically for Subaru platforms, supporting both daily driving and spirited performance use.
Features & Specifications
This Perrin Air Oil Separator Kit is engineered for Subaru WRX, WRX STI, Legacy GT, and Outback XT models, featuring swirl pot technology and a coolant-heated base plate. Constructed from CNC machined aluminum with a powder-coated finish, it delivers reliable oil separation and engine protection for Subaru enthusiasts seeking improved intercooler efficiency and reduced carbon buildup.
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Brand: Perrin Performance
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Product: Air Oil Separator Kit V1 (AOS) Neon Yellow w/ FMIC
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Part Number: PSP-ENG-607NY
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Fitment: 2002-2014 WRX / 2004-2021 WRX STI / 2005-2009 Legacy GT / 2005-2009 Outback XT
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Material: CNC Machined Aluminum
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Finish: Neon Yellow Powder Coat
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Construction: Multi-layer swirl pot baffle design
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Origin: USA Made
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Technology: Swirl Pot Oil Separation
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Heating Method: Coolant Heated Base Plate
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Includes: Car-specific mounting bracket, license plate frame, all hardware
Key Benefits
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Engine Protection: Prevents oil from entering the intake, reducing carbon buildup and detonation risk.
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Maintenance-Free: Returns oil to the engine, eliminating the need for regular draining like catch cans.
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Improved Efficiency: Keeps intercooler and intake system cleaner for better airflow and consistent power delivery.
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Durable Construction: CNC machined aluminum with powder-coated finish ensures long-lasting performance and corrosion resistance.
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Platform-Specific Fitment: Designed specifically for Subaru WRX, STI, Legacy GT, and Outback XT for precise installation and optimal function.
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Temperature Control: Coolant-heated base plate reduces condensation, maintaining separator efficiency in all conditions.
What's Included
- 1× Perrin Air Oil Separator Kit V1 (AOS) Neon Yellow w/ FMIC
- 1× Car-specific mounting bracket
- 1× Perrin license plate frame
- All necessary hardware for installation
- Installation instructions
Installation & Compatibility
The Perrin Air Oil Separator Kit installs with basic hand tools and is generally DIY-friendly for enthusiasts with moderate mechanical experience. The kit includes a car-specific mounting bracket and all necessary hardware for a secure fit. No tuning is required after installation, but verifying compatibility with your specific model year and trim is recommended to ensure proper fitment. The coolant line connection requires careful routing to avoid leaks and maintain system integrity.
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Professional Installation: Recommended for those unfamiliar with coolant line routing
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific year and trim level
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