AEM 21-478WR Performance Cold Air Intake System

Boost your Subaru's performance with the AEM 21-478WR Performance Cold Air Intake System. Designed specifically for select Subaru WRX, WRX STI, Impreza WRX, and Impreza WRX STI models, this intake system replaces your factory air filter and housing to deliver impressive horsepower and torque gains. It's engineered, tuned, and dyno-tested to ensure optimal performance.

Key Features

• Air Filter: Oversized AEM Dryflow synthetic washable air filter for superior airflow and filtration.
• Heat Shield: Protects the air filter while reducing intake air temperature, enhancing performance.
• Durable Construction: Mandrel-bent aluminum tubing with a textured wrinkle red powder-coated finish.
• Easy Installation: Designed for a straightforward installation using commonly available tools.
• Maintenance Friendly: The oil-free synthetic filter can last up to 100,000 miles before needing cleaning, depending on driving conditions.
• Warranty: Backed by AEM's Limited Lifetime Warranty for peace of mind.

Specifications

Fitment

This intake system is designed to fit various Subaru models, ensuring compatibility with your vehicle's factory emissions control devices, including the mass air flow sensor. For specific vehicle applications and legal status regarding emissions, please refer to the product details.

Customer Feedback

"The AEM 21-478WR has completely changed how my WRX performs. The throttle response is sharper, and I can feel the added power, especially at higher RPMs. Installation was straightforward, and the quality of the materials is impressive!"

"I've noticed a significant improvement in acceleration since installing this intake. The sound is also a nice touch—definitely a worthwhile upgrade for any Subaru enthusiast!"

Important Notes

California Air Resources Board Exempt: Yes; CARB EO: D-670-21; AEM - Metal Intake System; Wrinkle Red (CAS).