AEM Performance Cold Air Intake System, Wrinkle Red - Select 2008-2014 Subaru Impreza WRX / STI (21-478WR)

Fits select 2008-2014 Subaru Impreza, WRX, and WRX STI models. This AEM 21-478WR Performance Cold Air Intake System is engineered to increase horsepower and torque by replacing the restrictive factory air box and paper filter with a free-flowing, mandrel-bent aluminum intake track.

Designed, tuned, and dyno-tested for specific Subaru models, this system draws air through an oversized AEM Dryflow synthetic washable air filter. The filter is housed in the original air box location and protected by a custom-fit heat shield to isolate it from engine bay heat, ensuring a cooler, denser air charge. The aluminum tubing features a durable wrinkle red powder-coated finish for a classic performance look under the hood. This intake is designed to accommodate all factory emissions control devices, including the mass air flow (MAF) sensor, for seamless integration without a custom tune.

• Mandrel-Bent Tubing: Constructed from lightweight aluminum for smooth, unrestricted airflow and consistent diameter through bends.
• Dryflow Synthetic Filter: Oil-free, washable media provides high airflow and excellent filtration for up to 100,000 miles between cleanings.
• Heat Shield Included: Reduces intake air temperatures by shielding the filter from radiant engine heat.
• Easy Installation: Bolts to factory mounting points using commonly available hand tools; no cutting or drilling required.
• Manufacturer Part Number: 21-478WR
• Warranty: Backed by AEM's Lifetime Limited Warranty.