AEM 02-04 Impreza RS / 03-04 Impreza TS / 03-04 Outback Sport N/A 2.5L Cold Air Intake

Brand: AEM

Product Code: 21-472P

Availability:In stock

  • ncreased 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


The AEM 21-472P fits some Subaru Impreza, and Subaru Impreza RS models. 

The AEM 21-472P 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 and Impreza RS 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 chrome-like finish. This air intake system was developed to accommodate the engine’s factory emissions control devices including the IAT sensor and crank case breather hose. 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 21-472P vehicle applications to determine the legal status for each vehicle. 


AEM 21-472P Product Specifications
Replacement Filter 21-203DK
Air Filter Color Red
Air Filter Material Non-woven Synthetic
Air Filter Outlet Shape Round
Clamps Included 10
Clamp Material Stainless Steel
Clamp Style Mini
Couplers Included None
Product Style AEM Cold Air Intake System
Air Filter Height 5.125 in (130 mm)
Intake Pipe Color / Finish Polished
Intake Pipe Material Aluminum
CARB EO Number D-670-15
Street Legal In All US States Yes
TUV Approved (Europe) No
Weight 8 lb (3.6 kg)
Air Filter Large End Diameter 6 in (152 mm)
Product Box Height 10.6 in (269 mm)
Product Box Length 35.4 in (899 mm)
Product Box Width 13.3 in (338 mm)
Color Polished
Mounting Hardware Included Yes