Perrin Air Oil Separator V2 Red 2002-2021 WRX / 2004-2021 STi | Ceramic-Coated CNC Machined | Engine Health Component
Overview
The Perrin Air Oil Separator (AOS) V2 is a precision-engineered component designed to improve the crankcase ventilation system on Subaru WRX and WRX STI models spanning 2002 through 2021. By effectively separating oil vapors from the crankcase gases before they reach the intake manifold, this AOS helps prevent carbon buildup that can degrade engine performance and longevity. It is an essential upgrade for Subaru enthusiasts focused on maintaining engine health, particularly those with modified or high-mileage turbocharged engines where crankcase ventilation can become a limiting factor.
Constructed from CNC-machined aluminum and finished with a durable ceramic coating in red, the Perrin AOS combines robust materials with precise engineering. The ceramic coating offers excellent corrosion resistance and thermal stability, ensuring the unit withstands the harsh environment of the engine bay. Perrin Performance’s Subaru-specific design philosophy ensures seamless integration with factory PCV systems, maintaining reliability and drivability without requiring modifications.
For Subaru WRX and STI owners, the Perrin Air Oil Separator delivers real-world benefits such as reduced intake manifold contamination, improved throttle response, and extended engine life. This translates to a cleaner combustion environment and more consistent performance over time. Whether for daily driving or spirited use, this component supports the long-term health of your turbocharged Subaru engine, making it a practical and effective upgrade.
Features & Specifications
This Perrin Performance Air Oil Separator is engineered for 2002-2021 Subaru WRX and 2004-2021 WRX STI models. Featuring a ceramic-coated, CNC-machined aluminum construction, it delivers efficient oil vapor separation to protect your engine and maintain intake cleanliness for enthusiasts seeking reliable engine health solutions.
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Brand: Perrin Performance
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Product: Air Oil Separator V2 Red 2002-2021 WRX / 2004-2021 STi
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Part Number: PSP-ENG-620RD
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Fitment: 2002-2021 WRX, 2004-2021 WRX STI
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Material: CNC-machined aluminum
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Finish: Ceramic-coated red
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Construction: CNC machined with ceramic coating
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Origin: Made in USA
Key Benefits
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Engine Health: Reduces oil vapor contamination in the intake manifold, minimizing carbon buildup and preserving engine performance over time.
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Durability: Ceramic coating provides corrosion and heat resistance, ensuring long-lasting reliability in demanding engine environments.
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Fitment: Precision CNC machining guarantees a perfect fit for multiple WRX and STI model years, maintaining factory PCV system integration.
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Maintenance: Helps keep intake components cleaner, reducing the frequency and cost of intake cleaning and valve maintenance.
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Performance Support: Prevents oil vapor buildup that can disrupt airflow and combustion, supporting consistent throttle response.
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OEM Integration: Designed to work seamlessly with factory PCV systems without requiring any modifications or tuning.
What's Included
- 1× Perrin Air Oil Separator V2 Red 2002-2021 WRX / 2004-2021 STi
- Mounting hardware
- Installation instructions
Installation & Compatibility
Installation of the Perrin Air Oil Separator is straightforward and DIY-friendly for those with basic mechanical skills and common hand tools. It replaces the factory PCV oil separator and connects directly to existing vacuum lines without any modifications or special tools. The process typically takes under an hour, making it an accessible upgrade for most Subaru owners. This product is compatible with stock and lightly modified WRX and STI engines within the specified model years. No tuning is required after installation, allowing for immediate use without additional adjustments.
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Professional Installation: DIY-friendly
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific year and trim level before purchase
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