AEM's mandrel-bent aluminum cold air intake systems are guaranteed to provide an increase in horsepower and torque, and are protected by the AEM Lifetime Limited Warranty.
AEM cold air intake systems are designed to increase horsepower and torque. The system includes an oversized AEM DRYFLOW synthetic washable air filter, engineered to provide outstanding airflow, filtration, and performance, and also features a mandrel-bent aluminum intake tube and high quality hardware. The oversized, conical filter design allows you to go up to 100,000 miles between filter services under normal highway driving conditions. A custom heat shield helps protect intake air from the high temperature of your engine bay, and the factory fresh air duct attaches to the heat shield. The entire system can typically be installed in less than 90 minutes.
  • Precision-tuned and dyno-validated to enhance throttle response, sharpen acceleration, and improve overall engine efficiency, helping maximize horsepower and drivability.
  • Creates a deeper, more aggressive induction tone that highlights the intake system’s improved airflow.
  • Features low-restriction intake tubing that increases air velocity and high-volume airflow for maximum performance gains.
  • Equipped with a long-life, high-capacity air filter capable of up to 100,000 miles before servicing (depending on driving conditions), reducing maintenance while maintaining strong, clean airflow.
  • Utilizes washable, reusable, oil-free synthetic filter media that preserves airflow efficiency, traps harmful contaminants, and provides long-term value over disposable filters.

Application Summary:

Year Make/Model
2008-2014 Subaru Impreza
2012-2014 Subaru WRX
2013-2014 Subaru WRX STI
Attributes
Air Box Included No
Air Filter Color Red
Air Filter Material Non-woven Synthetic
Air Filter Outlet Shape Round
Air Filter Washable Yes
Alternate Part Number AEM-21-478C
California Proposition 65 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
California Restricted Not legal for sale or use in California
Clamp Color/Finish Natural
Clamp Material Stainless Steel
Clamp Style Worm Gear
Clamps Included 2
Country of Origin (Primary) US
Coupler Color/Finish Black
Couplers Included 1
Emission Code Not in CA
Estimated Horsepower Gain 36 HP @ 5300 RPM
Harmonized Tariff Code (Schedule B) 8421310000
Hazardous Material Code N
Horse Power Increase 36 HP
Intake Pipe Color / Finish Gunmetal Gray
Intake Pipe Material Aluminum
Intake Pipe Ports All intake tube ports needed for the specified applications are included
Life Cycle Status Code Available to Order
Mass Air Flow Sensor Adapter Included No
Mounting Hardware Included Yes
NAFTA Preference Criterion Code B
Oil Included No
Package Material Corrugated
Package Type Box
Product Style AEM Cold Air Intake System
Replacement Filter 21-2129D
RPM 5300
SDR Required Flag N
Street Legal In All US States Not legal for sale or use in California on any pollution controlled motor vehicle.
TUV Approved (Europe) No
Warranty Limited Lifetime
Weight 7.4 lb (3.3 kg)
GTIN 00024844391216

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