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AEM 21-779C Cold Air Intake for Mazda 3/6/CX-5



  • 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 21-779C fits some Mazda 3, Mazda 6, and Mazda CX-5 models. See vehicle applications for details.

The AEM 21-779C 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 6 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 located in the original air box space and is protected by a heat shield which is designed to reduce intake air temperature and increase horsepower. The air intake tube 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 airflow sensor and breather tube. 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 21-779C vehicle applications to determine the legal status for each vehicle. 
Estimated Horsepower Gain 7 HP @ 2700 RPM
Replacement Filter 21-2113DK
Air Filter Color Red
Air Filter Material Non-woven Synthetic
Air Filter Outlet Shape Round
Clamps Included 3
Clamp Material Stainless Steel
Clamp Style Regular
Couplers Included 1
Product Style AEM Cold Air Intake System
Air Filter Height 7 in (178 mm)
Intake Pipe Color / Finish Gunmetal Gray
Intake Pipe Material Aluminum
CARB EO Number D-670-24
Street Legal In All US States See Application Link Above
TUV Approved (Europe) No
Weight 8.7 lb (3.9 kg)
Product Box Height 12.25 in (311 mm)
Product Box Length 20.25 in (514 mm)
Product Box Width 12.25 in (311 mm)
Mounting Hardware Included Yes

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

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