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Part:   21-721C

AEM 21-721C 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
  • 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 21-721C fits some Mini Cooper John Cooper Works, Mini Cooper John Cooper Works GP, Mini Cooper S, and Mini Cooper S Clubman models. See vehicle applications for details.
The AEM 21-721C 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 Mini Cooper S, S Clubman and John Cooper Works 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 replacement air box with a fully-opened hood scoop which is designed to reduce intake air temperature and increase horsepower. The intake tubing is constructed from mandrel-bent aluminum featuring a durable black 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 vacuum line port as well as an AEM filter minder. The 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 21-721C vehicle applications to determine the legal status for each vehicle.

[More Information on AEM Cold Air Intake Systems]
Specifications AEM 21-721C Product Specifications
Estimated Horsepower Gain6 HP @ 5650 RPM
Replacement Filter21-2037D-HK
Air Filter ColorRed
Air Filter MaterialNon-woven Synthetic
Air Filter Outlet ShapeRound
Clamps Included3
Clamp MaterialSteel
Clamp StyleRegular
Couplers Included1
Product StyleAEM Cold Air Intake System
Air Filter Height7 in (178 mm)
Intake Pipe Color / FinishBlack
Intake Pipe MaterialHigh-Density Polyethylene
CARB EO NumberD-670-21
Street Legal In All US StatesYes
TUV Approved (Europe)No
Weight13.3 lb (6 kg)
Product Box Height16.75 in (425 mm)
Product Box Length24.38 in (619 mm)
Product Box Width18.38 in (467 mm)
Mounting Hardware IncludedYes
WarrantyLimited Lifetime

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

Tom Wong from Castro Valley, California
September 11, 2017 - Part 21-721C
Thank you for a well-designed and built air intake for my mini. It's both functional and beautiful. I noticed the difference in the low-end torque and the throttle response right away. Now my mini is so much more fun to drive.
Derric from Los Angeles, California
August 12, 2015 - Part 21-721C
Awesome intake. Easy install
Chuck Heiser from Sanford, North Carolina
March 30, 2015 - Part 21-721C
Easy install. I like the heat shield also. I believe that I am getting better gas mileage, as long as I don't get on it all the time!