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Part:   21-740C

AEM 21-740C Cold Air Intake

AEM Cold Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0
  • 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 21-740C fits some Ford Mustang models. See vehicle applications for details.
The AEM 21-740C 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 Ford Mustang Turbo 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 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 IAT sensor and PCV 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. 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 21-740C vehicle applications to determine the legal status for each vehicle.

[More Information on AEM Cold Air Intake Systems]
Specifications AEM 21-740C Product Specifications
Estimated Horsepower Gain12 HP @ 3600 RPM
Replacement Filter21-2148D-HK
Air Filter ColorRed
Air Filter MaterialNon-woven Synthetic
Air Filter Outlet ShapeRound
Clamps Included1
Clamp MaterialSteel
Clamp StyleRegular
Couplers IncludedNone
Product StyleAEM Cold Air Intake System
Air Filter Height5.5 in (140 mm)
Intake Pipe Color / FinishGunmetal Gray
Intake Pipe MaterialAluminum
CARB EO NumberD-670-23
Street Legal In All US StatesSee Vehicle Applications
TUV Approved (Europe)No
Weight13.5 lb (6.1 kg)
Product Box Height12.56 in (319 mm)
Product Box Length29.31 in (745 mm)
Product Box Width17.31 in (440 mm)
Mounting Hardware IncludedYes
WarrantyLimited Lifetime

Horsepower gains based on similar vehicle dynamometer test. Results will vary.
WARNING: Cancer and reproductive
Reviews Product Reviews

Jenn W from Dallas, Texas
January 1, 2017 - Part 21-740C
To be straight to the point, the AEM intake has been a wake up call to my engine. Really enjoying this product. Having the ecoboost has been interesting to modify and Mustang lovers are quickly warming up to the car. The CAI from AEM overall gets a 5 from for reasons I'll share. I notice it most of course when the boost kicks in around 3,000 rpm. Sound: 5/5 The whoosh is unmistakable. Performance: 5/5 Controlling my lead foot has been a problem. Install: 4/5 Had to rotate the filter a bit for it to safely fit, can slightly see the seam. Product materials: 5/5 light weight and little plastic involved. Style: 5/5 A little engine bling doesn't hurt.