SKU: B715160 | UPC: 700424676927
Cobb SF Airbox for 2015-2021 Subaru WRX STI
The Cobb SF Airbox replaces the restrictive factory airbox on 2015-2021 Subaru WRX STI models. This precision-engineered component delivers substantially more air volume and velocity to the engine, improving throttle response and power delivery throughout the RPM range. It installs as a direct bolt-on part with no modifications needed.
Key Features
- Massive Air Inlet: 3″ x 5.5″ rectangular opening pulls in more air than stock for enhanced engine breathing.
- Expanded Filter Area: Doubles the stock filter surface area to support higher flow rates without restriction.
- Large Velocity Stack: Integrated design minimizes turbulence and promotes smooth, laminar airflow into the filter.
- High-Temp Nylon Construction: Durable, heat-resistant material withstands underhood temperatures while reducing weight to 4.8 lbs.
- Integrated MAF Housing: Secures the factory mass air flow sensor in its optimal position for accurate readings.
Product Notes
- Compatible with Cobb SF Air Filter or stock replacement filter for full intake upgrade.
- MPN 715160 maintains EPA compliance for street use.
Installation Notes
- Professional installation recommended.
- Bolt-on replacement using factory hardware and clips 30-45 minute install time.
- Ensure air filter is seated properly to seal against the airbox lid.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2021 | Subaru | WRX STI | All |
Why Choose Cobb?
- Decades of Subaru-specific engineering experience.
- Components tested for reliability over millions of miles.
- Direct-fit designs integrate seamlessly with factory setups.
Frequently Asked Questions
- Q: Will this fit my 2015-2021 Subaru STI?
A: Yes, it provides a direct bolt-on fit for all 2015-2021 Subaru WRX STI models with EJ257 engine, no trimming or adjustments required. - Q: What material is the airbox made from?
A: Injection-molded from high-temperature nylon composite for strength, lightweight performance at 4.8 lbs, and heat resistance up to 250°F. - Q: What is the warranty and install process?
A: Backed by Cobb’s 1-year limited warranty installation is straightforward DIY with basic tools, though professional tuning advised for tuned vehicles.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure custom box, 20″ x 15″ x 10″ dimensions
- Weight: 5.3 lbs shipping weight
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