IAG Performance Oil Catch Cans

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Why Choose an IAG Oil Catch Can for Your Subaru?

IAG Performance oil catch cans and Air / Oil Separators (AOS) are engineered specifically for turbocharged Subaru engines. By separating oil vapor from crankcase ventilation gases, an IAG catch can system helps reduce carbon buildup, maintain consistent octane levels, and protect long-term engine reliability.

Unlike universal catch can setups, IAG oil catch cans for Subaru WRX and STI are vehicle-specific, with application-matched hose routing and mounting solutions for proper integration.

Street Series vs Competition Series IAG AOS

IAG offers both Street Series and Competition Series oil control systems depending on build goals:

  • Street Series AOS: Designed for daily-driven vehicles like the Subaru WRX and Subaru STI. Recirculates oil vapors back into the system while maintaining emissions compatibility.
  • Competition Series AOS: Designed for track and high-boost builds. Vent-to-atmosphere configuration prioritizes maximum oil control under extreme conditions.

Benefits of Installing an IAG Catch Can or AOS

  • Reduces oil contamination in intake and intercooler piping
  • Helps prevent carbon buildup on intake valves
  • Improves long-term engine reliability
  • Supports consistent combustion under boost
  • Essential for modified and high-horsepower Subaru builds

Supported Subaru Applications

IAG catch cans and AOS systems are available for:

Browse additional engine performance parts to support your oil control and crankcase ventilation upgrades.

Frequently Asked Questions

Do I need a tune after installing an IAG AOS?

Street Series systems typically do not require retuning when installed on otherwise stock vehicles. However, modified builds should always verify fueling and crankcase ventilation setup.

Is an IAG catch can necessary for a stock Subaru?

While not mandatory, installing an oil control system can help reduce long-term carbon buildup and improve engine cleanliness, especially on turbocharged platforms.

What is the difference between a catch can and an AOS?

A traditional catch can collects oil vapor in a container that must be manually drained. An Air / Oil Separator (AOS) continuously separates oil and returns it to the crankcase, offering a maintenance-free solution for most users.

Will an IAG AOS help prevent carbon buildup?

Yes. By reducing oil vapor entering the intake system, an IAG oil separator can help minimize carbon deposits on intake valves, especially in direct-injection turbocharged Subaru engines.