COBB Air Intake Subaru WRX STI Sedan (2015-2021) Redline Carbon Fiber - 725350

Fitment Information

• Subaru WRX STI Sedan VA (2015, 2016, 2017, 2018, 2019, 2020, 2021)
  
  • Fits Manual Transmission Models Only
    

Emissions Compliance

• 50 State Legal - This part is legal for sale and use on Emissions Controlled Vehicles in all 50 states when used in accordance with the manufacturer's application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number: D-660-79

Note

• This will not fit with the COBB Radiator Shroud.

Specs & Features

• Carbon Fiber Construction: Main airbox and scoop are molded from genuine 2x2 Twill Carbon Fiber with a heat-resistant high-gloss finish.
• Velocity Stack Tech: Integrated Velocity Stack and airflow straightener ensure clean MAF readings for smooth idle and consistent power.
• Massive Filtration: Uses a pre-oiled filter that is 35% Larger than standard for maximum airflow and dust capacity.
• Adjustable Sound: Features a Removable Billet Plate to switch between a sealed cold-air box or an open setup for louder turbo noise.
• Easy Tuning: Fully compatible with existing COBB OTS Maps (Stage 1+SF & Stage 3) for plug-and-play performance.
• Premium Hardware: Assembled with black anodized billet adapters and wire-reinforced silicone couplers for a seamless fit.

Product Description

For years, the Subaru community asked for a "no compromise" intake. The COBB Tuning Redline Carbon Fiber Intake is the answer. This isn't just a plastic pipe wrapped in a carbon sticker. The entire airbox and integrated scoop are molded from multiple layers of real 2x2 Twill Carbon Fiber. It is lightweight, incredibly strong, and features a deep gloss finish that makes it the centerpiece of any engine bay.

Subarus are notoriously picky about intakes. If the air hitting the MAF sensor is turbulent, the car will idle roughly and hesitate under load. COBB engineers solved this with a custom Composite Velocity Stack. This design smooths the air as it enters the piping, and a unique Air Flow Straightener Grid ensures the sensor gets a precise reading every time. The housing is made from a high-temp composite to reduce heat transfer, keeping the intake charge cool.

Want a quiet daily driver or a loud weekend warrior? You get both. The airbox features a removable billet aluminum plate on the fender side.

• Plate On: The system acts as a sealed airbox, drawing cold air exclusively from the front grille scoop.

• Plate Off: The box opens up to the fender well, drawing in more volume and significantly amplifying the Induction Noise (turbo spool and BPV venting).

Despite looking like a complex aero part, installation is a breeze. The integrated scoop and box drop in as a single unit using supplied brackets. Once installed, accessing the massive filter for cleaning is straightforward—no need to disassemble the whole front end.

The Redline Series resets the bar for what a Subaru intake should be. It marries the exotic look of carbon fiber with the reliability of COBB's data-driven engineering. Whether you are chasing horsepower on a Stage 3 build or just want to tidy up the engine bay of a daily driver, this is the premier choice. It fits, it flows, and it looks absolutely stunning. Upgrade to Redline.