V3 Air/Oil Separator - AOS
Fits: 08-14 WRX, 08-21 STI, 05-09 Legacy GT/Outback XT, 09-13 Forester XT
Talk to an Enthusiast
Verify Fitment & Product Recommendations
M-F 9:00AM - 6:00PM
Pay over time · Est. $18.59/payment ⓘ
Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded. View all options
Pay over time · Est. $18.59/payment ⓘ
Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded. View all options
Fitment
Fitment
- 2009-2013 Subaru | Forester XT
- 2008–2021 Subaru | WRX STI
- 2008–2014 Subaru | WRX
- 2005-2009 Subaru | Legacy GT
Description
Description
The COBB Tuning V3 Air/Oil Separator is designed for Subaru EJ engines with dedicated ports for each crankcase vent, improving pressure evacuation and oil separation while helping prevent oil vapors from recirculating into the intake system.
- Compact cast aluminum tank with approximately 1 liter capacity
- Snail-shaped base promotes oil drainage and separation
- Coolant routing heats the canister to help evaporate water contamination
- Bespoke COBB anodized caps and wrinkle-black powder-coated canister
- Laser-etched COBB logo
- Developed in partnership with IAG Performance
- 50-state CARB legal
- Official fitment: Subaru WRX 2008–2014; WRX STI 2008–2021; Legacy GT 2005–2009; Outback XT 2005–2009; Forester XT 2009–2013
- Warranty: Cobb MFG Warranty
- References: COBB official product page and installation instructions
Shipping and Delivery
Shipping and Delivery
Review our Shipping Policy for delivery details, shipping costs and exclusions.
Warranty and Support
Warranty and Support
Return and Refund
Return and Refund
Eligibility, exclusions, applicable fees and exceptions are detailed in our Return Policy. Restrictions apply to special-order and custom products.
Proposition 65
Proposition 65
Proposition 65 Warnings: cancer and reproductive harm www.p65warnings.ca.gov
![COBB [08 - 14 WRX, 08 - 21 STI, 05 - 09 LGT, 05 - 09 OBXT, 09 - 13 FXT] V3 Air / Oil Separator - AOS - JDMuscleAir Oil Separatorscobb822615](http://jdmuscleusa.com/cdn/shop/products/cobb-08-14-wrx-08-21-sti-05-09-lgt-05-09-obxt-09-13-fxt-v3-air-oil-separator-aos-6347596.jpg?v=1770336430&width=1445)