SKU: B843615 | UPC: 700424680320
Cobb 2015-2021 Subaru WRX Air Oil Separator
The Cobb Air Oil Separator mounts near the turbo on 2015-2021 Subaru WRX models to trap oil vapors from the PCV and brake booster systems before they reach the intake tract. This keeps the intercooler and piping clean for consistent boost and power delivery. Direct-fit design installs in under an hour with no cutting or permanent modifications.
Key Features
- Billet 6061-T6 Aluminum Body: Lightweight at 1.4 lbs yet robust for track or street use, with black anodized finish and laser-etched Cobb logo.
- Integrated Check Valve: Retains full boost pressure in the crankcase while allowing oil-laden vapors to separate efficiently.
- 4AN Nylon Braided Hoses: High-flow fittings and durable lines rated for extreme boost levels up to 30 psi.
- Easy-Access Drain Valve: Ball-valve design for quick oil emptying without tools, sight tube shows fill level instantly.
- Complete Bolt-On Kit: Includes custom bracket, all hardware, fittings, and hoses for plug-and-play fitment on VA-chassis WRX.
Product Notes
- Drain separator every 1,000-3,000 miles or after track days depending on driving style.
- Clean internal baffles periodically for peak separation performance.
Installation Notes
- Professional installation recommended.
- 30-60 minute install using basic hand tools remove stock PCV hose and brake booster line.
- Bracket mounts to factory valve cover location no drilling required.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2021 | Subaru | WRX | Base |
| 2015-2021 | Subaru | WRX | Premium |
| 2015-2021 | Subaru | WRX | Limited |
Why Choose Cobb?
- Decades of Subaru tuning expertise with millions of Accessport installations worldwide.
- Made in USA with dyno-proven designs for real-world power gains.
- CNC-machined components ensure exact fit and leak-free operation.
Frequently Asked Questions
- Q: Does this fit 2021 WRX models?
A: Yes, fully compatible with all 2015-2021 VA-chassis Subaru WRX including Base, Premium, and Limited trims with EJ255 FA20F engines. - Q: What material is the separator made from?
A: Precision-machined billet 6061-T6 aluminum with black anodizing for corrosion resistance and a factory-style appearance under the hood. - Q: What is the warranty and install difficulty?
A: Backed by Cobb’s limited lifetime warranty straightforward bolt-on process takes 30-60 minutes for DIYers with basic tools.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure foam-protected box, 12 x 8 x 6 inches
- Weight: 2 lbs
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