COBB Tuning High Flow Filter - 2002-2007 Subaru WRX / 2004-2007 STI

Better Air In, Better Power Out — Starting With the Filter

The Cobb High Flow Filter for the 2002-2007 Subaru WRX/STI is the simplest airflow upgrade on the car — a direct drop-in replacement for the factory paper filter that flows more air with less restriction while still filtering down to the same particulate level. It's not the most dramatic upgrade on the shelf, but it's the one that takes 15 minutes, costs almost nothing relative to what it enables, and is the correct foundation before any tuning work.

Drop-In Replacement, Immediate Benefit

The Cobb filter drops directly into the factory airbox on the GD WRX/STI without modification. No new intake tube, no heat shield delete, no relocation — the airbox stays where it is and the filter slots in. The higher flow rate of the Cobb filter is something the Accessport OTS maps account for, so if you're running a Cobb tune this is the correct filter to pair with it.

The Right First Step Before Going Further

Every Stage 1 Cobb OTS map for the GD WRX/STI is calibrated with a high-flow filter in mind. Running the stock paper filter against a tune designed for more airflow leaves power on the table. The Cobb filter is the component that makes Stage 1 tuning work correctly — not just an add-on.

Key Features

• Platform: 2002-2007 Subaru WRX/STI
• SF sealed airbox design — draws from cold-air source, not hot engine bay air
• Direct drop-in replacement for factory filter — no modification required
• Calibrated to work with Cobb Accessport OTS maps
• Bolt-in installation at factory airbox location

Fitment Notes

• Platform: 2002-2007 Subaru WRX/STI
• Direct bolt-in replacement — no modification required
• Confirm color/variant from product title or dropdown before ordering

Straight From Subispeed

The Cobb High Flow Filter for the GD WRX/STI is the correct supporting hardware for any Cobb Accessport tune on this platform. The sealed airbox design is particularly important for daily-driven cars where intake temperatures vary throughout the day — cold air source intake means consistent temps regardless of how hot the engine bay gets. If you are building a GD WRX/STI on the Cobb platform, this is the intake piece that belongs in the build.

What's Included

• Cobb High Flow Panel Filter — 2002-2007 Subaru WRX/STI

About Cobb Tuning

Cobb Tuning has been developing performance parts and tuning solutions for Subaru vehicles since 1999. Based in Austin, Texas, Cobb built their reputation on the Accessport — the most widely used Subaru ECU tuning device on the market — and expanded that into a full ecosystem of intake, exhaust, drivetrain, and engine bay accessories engineered specifically for the platforms they support. Every Cobb product is developed in-house and validated on their own test vehicles before it reaches customers. Subispeed carries the full Cobb catalog because their engineering standards and platform-specific development process consistently produce parts that work exactly as advertised.