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SKU: B724160 | UPC: 700424678174
Cobb 08-14 Subaru WRX/STI / 05-09 LGT/OBXT / 09-13 FXT Airbox
The Cobb SF Airbox replaces the factory airbox on select Subaru turbo models with a larger, sealed enclosure that pulls in cooler outside air for denser intake charge. Designed for 2008-2014 Impreza WRX/STI, 2005-2009 Legacy GT/Outback XT, and 2009-2013 Forester XT, it supports stock or Cobb SF intake setups. Dyno testing shows consistent horsepower and torque increases through improved airflow volume and velocity.
Key Features
- Large Filter Surface: Nearly 100% more filter area than stock reduces restriction and maintains clean airflow under high boost.
- Fully Sealed Enclosure: Blocks hot engine bay air, drawing only cool fender-well air to lower intake temps and raise power output.
- Smooth Ram Tubes: Oversized inlet with velocity stack ensures laminar flow directly to turbo for minimal turbulence.
- Factory Mounting: Bolts into OEM locations using stock hardware for plug-and-play installation without modifications.
- Dyno-Proven Gains: Delivers 5-10 whp increases depending on tune, with gains across the RPM range on unmodified engines.
Product Notes
- Requires no ECU flashing; works with factory air filter or Cobb SF filter element.
- Clean filter every 15,000 miles or sooner in dusty conditions for peak performance.
Installation Notes
- Professional installation recommended.
- Complete in 30-45 minutes using basic hand tools remove stock airbox and clip in new unit.
- Includes nylon clips and hardware for secure, vibration-free mounting.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2014 | Subaru | Impreza | WRX |
| 2008-2014 | Subaru | Impreza | WRX STI |
| 2005-2009 | Subaru | Legacy | GT |
| 2005-2009 | Subaru | Outback | XT |
| 2009-2013 | Subaru | Forester | XT |
Why Choose Cobb?
- Leaders in Subaru tuning with products used in rally and track racing.
- Every component tested on dyno and real-world vehicles for reliable gains.
- Engineered in the USA with precision molds and high-temp materials.
Frequently Asked Questions
-
Q: Does this fit a 2011 STI Limited?
A: Yes, compatible with all 2008-2014 Impreza WRX STI trims including base, Limited, and hatchback variants. -
Q: What material construction?
A: Injection-molded cross-linked polyethylene resists heat up to 250°F and withstands boost pressure. -
Q: What warranty coverage?
A: Limited lifetime warranty on manufacturing defects when installed correctly.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Custom cardboard box, 22" x 14" x 12"
- Weight: 5.5 lbs
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