AEM Cold Air Intake System (Gunmetal) Subaru WRX/STI 2004-2007
21-477C
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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.
- Increased horsepower
- Tuned and dyno-tested to improve acceleration and engine sound
- Low restriction aluminum tubing
- Air filter lasts up to 100,000 miles before cleaning is required (depending on driving conditions)
- Washable and reusable oil-free filter media
- AEM Lifetime Limited Warranty
Specs:
- Replacement Filter 21-2038DK
- Air Filter Color Red
- Air Filter Material Non-woven Synthetic
- Air Filter Outlet Shape Round
- Clamps Included 5
- Clamp Material Steel
- Clamp Style Regular
- Couplers Included None
- Product Style AEM Cold Air Intake System
- Air Filter Height 8.125 in (206 mm)
- Intake Pipe Color / Finish Gunmetal Gray
- Intake Pipe Material Aluminum
- CARB EO Number D-670-15
- Street Legal In All US States See Vehicle Applications
- Air Filter Large End Diameter 6 in (152 mm)
- Mounting Hardware Included Yes
- Warranty Limited Lifetime
Fitment:
- Subaru WRX/STI 2004-2007
- Subaru Forester XT 2004-2005
- Saab 9-2X Aero 2006
Review pages below for additional information:
