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SKU: PSP-ENG-620BK
PERRIN Air Oil Separator – Black – 2002-2021 Subaru WRX / 2004-2021 STI
The PERRIN PSP-ENG-620BK Air Oil Separator for 2002-2021 Subaru WRX and 2004-2021 STI. High-capacity baffled design with black anodized finish traps oil vapor, prevents blow-by contamination, reduces carbon buildup on intake valves and turbo, and maintains clean intake charge.
Key Features
- High-Capacity Baffled Design – Effectively separates oil from blow-by vapors before re-entering the intake
- Black Anodized Finish – Premium black coating for corrosion resistance and standout engine bay appearance
- WRX/STI Specific – Engineered for direct fitment on 2002-2021 WRX and 2004-2021 STI models
- Prevents Oil Contamination – Keeps intercooler, intake valves, and turbo clean for consistent performance
- Easy Installation – Bolt-on replacement with all necessary hardware and fittings included
| Spec | Detail |
|---|---|
| Part Number | PSP-ENG-620BK |
| Brand | PERRIN Performance |
| Type | Air Oil Separator |
| Finish | Black Anodized |
| Compatibility | 2002-2021 Subaru WRX / 2004-2021 Subaru STI |
| Country of Origin | United States |
| Warranty | PERRIN Limited Lifetime Warranty |
Whats Included
- 1 x PERRIN Air Oil Separator (black anodized)
- All necessary hoses, fittings, and mounting hardware
- Installation instructions
Product Notes
- Designed specifically for 2002-2021 Subaru WRX and 2004-2021 STI models
- Prevents oil vapor from coating intake tract and turbo components
- Ideal for stock, tuned, or high-boost WRX/STI applications
Installation Notes
- Bolt-on replacement for factory PCV system components
- Estimated time: 1–2 hours
- Professional installation recommended for proper hose routing and torque
This Part Fits
| Year Range | Make | Model | Trim / Engine | Notes |
|---|---|---|---|---|
| 2002-2021 | Subaru | WRX | All trims | Air Oil Separator |
| 2004-2021 | Subaru | STI | All trims | Air Oil Separator |
Why Choose PERRIN Air Oil Separators?
- #1 choice for effective blow-by separation on modern turbo Subarus
- Built & tested in the United States
- Chosen by WRX/STI owners for cleaner intake, sustained power, and signature black anodized styling
Frequently Asked Questions
-
Q: Does this fit my 2018 Subaru WRX?
A: Yes, direct fit for 2002-2021 Subaru WRX and 2004-2021 STI models. -
Q: Does it require tuning?
A: No, bolt-on design works with stock ECU; gains are noticeable without tuning. -
Q: How often should I drain it?
A: Drain periodically (every oil change recommended) to remove collected oil and maintain performance.
Shipping & Handling
- Method: Ground UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Official PERRIN retail box
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