IAG Performance V3 Street Series Air / Oil Separator (AOS) World Rally Blue 2008-2014 WRX / 2008-2021 STI / 2009-2013 Forester XT / 2005-2009 Legacy GT / 2005-2009 Outback XT | 1 Liter Capacity | Engine Protection Upgrade
Overview
The IAG Performance V3 Street Series Air / Oil Separator (AOS) is a precision-engineered solution designed to protect your Subaru’s engine by effectively separating oil from the PCV system gases before they re-enter the intake tract. This upgrade is ideal for Subaru WRX, WRX STI, Forester XT, Legacy GT, and Outback XT owners who want to maintain engine health, prevent intake contamination, and extend the longevity of their turbocharged engines without the hassle of regular maintenance.
Built around a robust 1-liter cast aluminum swirl pot canister, the V3 AOS incorporates a unique internal baffle system that enhances oil separation efficiency while maintaining optimal crankcase ventilation. IAG’s design philosophy focuses on durability, seamless integration with OEM PCV systems, and eliminating common issues found in lesser catch cans, such as sludge buildup and overflow. The inclusion of a heating system connected to the vehicle’s cooling circuit ensures condensation is minimized, preventing oil sludge and maintaining consistent performance.
For Subaru enthusiasts, this AOS offers tangible benefits by reducing oil contamination in the intake, which can cause detonation, power loss, and premature wear on intake components. Its large capacity and smart oil return system allow separated oil to drain safely back into the crankcase, eliminating the need for manual draining. The World Rally Blue finish adds a subtle yet distinctive OEM+ aesthetic that complements your engine bay while delivering reliable protection for daily driving and spirited performance.
Features & Specifications
This IAG Performance V3 Street Series Air / Oil Separator is engineered for Subaru WRX, WRX STI, Forester XT, Legacy GT, and Outback XT models. Featuring a 1-liter cast aluminum canister with a unique baffling system and integrated heating, it provides superior oil separation and engine protection without requiring tuning or maintenance.
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Brand: IAG Performance
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Product: V3 Street Series Air / Oil Separator (AOS) World Rally Blue
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Part Number: IAG-ENG-7186WRB
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Fitment: 2005-2009 Legacy GT, 2008-2014 WRX, 2008-2021 WRX STI, 2009-2013 Forester XT, 2005-2009 Outback XT
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Material: Cast Aluminum
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Finish: Powder Coat, World Rally Blue (Subimods Exclusive)
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Construction: Cast Aluminum with Internal Baffle System
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Origin: Not Specified
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Capacity: Approximately 1 Liter
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Heating System: Integrated coolant line for condensation prevention
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Installation Hardware: SAE Quick Connection lines included
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Maintenance: No manual draining required
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Tuning Required: No
Key Benefits
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Engine Protection: Prevents oil contamination in intake and combustion chambers, reducing risk of detonation and premature engine wear.
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Maintenance-Free Operation: Large capacity and oil return system eliminate the need for regular draining or catch can upkeep.
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OEM Integration: Seamlessly works with factory PCV system and ECU settings without requiring tuning.
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Condensation Control: Unique heating system connected to engine coolant prevents sludge buildup common in inferior designs.
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Durable Construction: Cast aluminum body with powder coat finish ensures long-lasting corrosion resistance and a clean engine bay appearance.
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Fitment & Aesthetics: Custom World Rally Blue finish exclusive to Subimods adds a subtle OEM+ visual upgrade.
What's Included
- 1× IAG Performance V3 Street Series Air / Oil Separator (AOS) World Rally Blue
- Custom length SAE Quick Connection lines for secure and leak-free installation
- All necessary fittings for installation
- Installation instructions for applicable Subaru models and years
Installation & Compatibility
Installation of the IAG V3 AOS is straightforward for enthusiasts with moderate mechanical experience, thanks to the included SAE Quick Connection lines and detailed instructions for multiple Subaru platforms. No special tools beyond standard hand tools are typically required. The system integrates directly with the factory PCV and cooling systems, so no tuning or ECU modifications are necessary. Proper fitment verification is recommended to ensure compatibility with your specific model year and trim.
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Professional Installation: Recommended for those unfamiliar with PCV and coolant line routing
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Modifications Required: None; direct bolt-on integration with OEM systems
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Verify Compatibility: Confirm fitment for your Subaru WRX, WRX STI, Forester XT, Legacy GT, or Outback XT model year
Shop with confidence at Subimods—your Subaru parts specialists.
