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Part:   21-765C

AEM 21-765C Cold Air Intake

AEM Cold Air Intake System
  • Increased horsepower
  • Tuned and dyno-tested to improve acceleration and engine sound
  • Low restriction aluminum tubing
  • Easy to install using commonly available tools
  • 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 21-765C fits some Mazda 3 models. See vehicle applications for details.
The AEM 21-765C 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 Mazda 3 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 driver-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 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 easy to install with commonly available tools and it 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 21-765C vehicle applications to determine the legal status for each vehicle.

[More Information on AEM Cold Air Intake Systems]
Specifications AEM 21-765C Product Specifications
Estimated Horsepower Gain6 HP @ 4400 RPM
Air Filter ColorRed
Air Filter Height5 in (127 mm)
Air Filter MaterialNon-woven Synthetic
Air Filter Outlet ShapeRound
California RestrictedNot legal for sale or use in California
Clamp MaterialStainless Steel
Clamp StyleRegular
Clamps Included4
Couplers Included1
Intake Pipe Color / FinishGunmetal Gray
Intake Pipe MaterialAluminum
Product Box Height11.6 in (295 mm)
Product Box Length24.38 in (619 mm)
Product Box Width12.2 in (310 mm)
Product StyleAEM Cold Air Intake System
Replacement Filter21-202DOSK
Street Legal In All US States No
TUV Approved (Europe)No
Weight6.7 lb (3.1 kg)

Horsepower gains based on similar vehicle dynamometer test. Results will vary.