IAG In-Line Check Valve for Street Series AOS | 2002-2004 Subaru WRX | RPL-718XCV
Video description
Installing an IAG Street Series Air Oil Separator on your 2002-2004 Subaru WRX? This IAG In-Line Check Valve is the missing piece needed to properly adapt the IAG Street Series AOS (IAG-ENG-7180) to early EJ20-powered WRX models.
The factory PCV valve on 2002-2004 WRXs features a larger diameter than later EJ engines, preventing the standard Street Series AOS kit from installing correctly. This check valve solves that compatibility issue, allowing you to complete your installation with proper PCV system operation.
Fitment:
Subaru WRX (2002-2004)
Features:
- Adapts the IAG Street Series AOS (IAG-ENG-7180) to early EJ20 WRX models
- Designed specifically for 2002-2004 Subaru WRX
- Installs using the supplied 3/8" hose from the AOS kit
- Directional arrow ensures correct airflow when installed toward the intake manifold
- Genuine IAG replacement component
Important Installation Note:
Removing the factory PCV valve leaves an opening that must be filled. To complete the installation, you'll also need the updated Subaru OEM Intake Manifold Fitting (14076AA030), sold separately.



