Description

The AEM 21-477C Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicle’s restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno-tested to fit specific Subaru Impreza WRX/WRX STI, Forester Turbo and SAAB 9-2X models. Air enters the system through an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration and performance. The air filter is relocated to the passenger-side wheel well which is designed to reduce intake air temperature and increase horsepower. The intake tubing is constructed from mandrel-bent aluminum featuring a durable gunmetal gray powder coated finish. This air intake system was developed to accommodate the engine’s factory emissions control devices including the mass air flow sensor. The tapered cylinder shaped AEM Dryflow air filter is made from an oil-free, synthetic filter media that can be used for up to 100,000 miles before cleaning is needed (depending on driving conditions). The air intake system is backed by AEM’s Lifetime Limited Warranty. Some AEM air intakes are not legal for sale or use in California and other states adopting California emission standards, while others are 50 state legal. View the 21-477C vehicle applications to determine the legal status for each vehicle.
AEM’s Performance Cold Air Intake Systems are designed, tuned and dyno-tested to give your engine more power and acceleration by replacing the restrictive factory air filter, air intake tubing and air box assembly.

Fitment:
Saab9-2X2.5i2006
Saab9-2XAero2006
SubaruForesterXT2004
SubaruForesterXT2005
SubaruForesterXT Premium2005
SubaruImprezaWRX2006
SubaruImprezaWRX2007
SubaruImprezaWRX Limited2006
SubaruImprezaWRX Limited2007
SubaruImprezaWRX STI2004
SubaruImprezaWRX STI2005
SubaruImprezaWRX STI2006
SubaruImprezaWRX STI2007
SubaruImprezaWRX STI Limited2007
SubaruImprezaWRX TR2006
SubaruImprezaWRX TR2007