AEM COLD AIR INTAKE SYSTEM For 10-14 Mazda MX-5 2.0L L4 - 21-729C

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The AEM 21-729C 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 MX-5 and MX-5 Miata 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. An AEM Dryflow Pre-Filter Wrap is included to prevent splashes of water or mud from saturating the air filter. 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 21-729C 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

Installation PDF

Installation Instruction Sheet

Dyno Chart - 2013 Mazda MX-5 Miata 2.0L - 3HP Increase


Estimated Horsepower Gain 3 HP @ 6000 RPM
Replacement Filter 21-203DK
Air Filter Color Red
Air Filter Material Non-woven Synthetic
Air Filter Outlet Shape Round
Clamps Included 3
Clamp Material Steel
Clamp Style Regular
Couplers Included 1
Product Style AEM Cold Air Intake System
Intake Pipe Color / Finish Gunmetal Gray
Intake Pipe Material Aluminum
CARB EO Number D-670-22
Street Legal In All US States Yes
TUV Approved (Europe) No
Weight 8.3 lb (3.8 kg)
Product Box Height 11.6 in (295 mm)
Product Box Length 24.38 in (619 mm)
Product Box Width 12.2 in (310 mm)
Mounting Hardware Included Yes
Warranty Limited Lifetime


Supported Vehicles

2014 Mazda MX-5 2.0L L4 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-22

2014 Mazda MX-5 Miata 2.0L L4 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-22

2013 Mazda MX-5 2.0L L4 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-22

2013 Mazda MX-5 Miata 2.0L L4 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-22

2012 Mazda MX-5 2.0L L4 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-22

2012 Mazda MX-5 Miata 2.0L L4 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-22

2011 Mazda MX-5 2.0L L4 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-22

2011 Mazda MX-5 Miata 2.0L L4 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-22

2010 Mazda MX-5 2.0L L4 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-22

2010 Mazda MX-5 Miata 2.0L L4 Gas

All Models

Street Legal in All US States: Yes

CARB EO Number:

D-670-22

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