Part Number: PSP-ENG-622

Description: Perrin Air Oil Separator V2

Fitment: 22+ Subaru WRX VB

Notes: Not for sale in California not CARB Legal

Details:

The Perrin Air Oil Separator (AOS) V2 is a precision-engineered solution designed specifically for the 2022+ Subaru WRX to effectively separate oil vapors from crankcase gases before they reach the intake manifold. By capturing these oil vapors, the AOS helps reduce carbon buildup on intake valves, a common concern for direct-injection engines like the WRX. This part is ideal for Subaru enthusiasts focused on maintaining engine longevity and preserving peak performance under daily driving or spirited conditions.

Built with a ceramic-coated, CNC-machined aluminum housing, the Perrin AOS combines durability with efficient heat dissipation. The ceramic coating enhances corrosion resistance and contributes to consistent vapor separation performance over time. Perrin’s commitment to quality and platform-specific fitment ensures this AOS integrates seamlessly with the WRX’s factory PCV system without requiring any modifications, preserving the vehicle’s reliability and OEM-level fitment.

For Subaru owners, the Perrin Air Oil Separator delivers real-world benefits by maintaining a cleaner intake tract, which supports smoother idle, improved throttle response, and reduces the frequency of intake valve cleaning. This is especially valuable for turbocharged WRX engines where blow-by gases increase under load, helping to protect engine health and sustain performance over the long term.

Features & Specifications

This Perrin Air Oil Separator is engineered for the 2022-2026 Subaru WRX and features a ceramic-coated, CNC-machined aluminum construction. Designed to improve engine health by reducing oil vapor contamination, it delivers reliable separation performance for Subaru enthusiasts seeking to maintain clean intake systems and optimize engine longevity.

• Material: CNC-machined aluminum

• Finish: Available Black or Red ceramic coating

• Construction: CNC machined, ceramic coated

• Origin: Made in USA

Key Benefits

• Engine Health: Effectively reduces oil vapor contamination in the intake manifold, minimizing carbon buildup on intake valves for cleaner combustion.

• Durability: Ceramic-coated aluminum housing resists corrosion and withstands heat, ensuring long-lasting performance in the engine bay environment.

• Fitment: Direct bolt-on design integrates seamlessly with the 2022-2026 WRX PCV system without requiring modifications, preserving factory reliability.

• Performance: Maintains cleaner intake air for improved throttle response and smoother idle characteristics, enhancing daily driving experience.

• Maintenance: Helps extend intervals between intake cleaning and valve maintenance, reducing service costs and downtime.

What's Included

• 1× Perrin Air Oil Separator V2

• Mounting hardware

• Installation instructions

Installation & Compatibility

Installation of the Perrin Air Oil Separator V2 is straightforward with a direct bolt-on fitment to the factory PCV system on the 2022+ Subaru WRX. Basic hand tools are sufficient, making this a DIY-friendly upgrade for enthusiasts comfortable working in the engine bay. No special tuning or modifications are required, but verifying fitment for your specific model year and trim is recommended to ensure compatibility.

• Professional Installation: DIY-Friendly

• Modifications Required: None