Key Features & Benefits
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High-flow AEM Dryflow synthetic air filter: washable, oil-free media, up to ~100,000 miles between cleanings under normal conditions.
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Mandrel-bent, large-diameter intake tubing with a replacement air box featuring a functional hood scoop, designed to reduce intake air temperature and improve horsepower.
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Dyno tested gain: approximately +6 HP @ 5650 RPM on this application.
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Designed to integrate with factory MAF sensor, vacuum lines and emissions plumbing—clean bolt-on.
AEM Cold Air Intake Systems are designed to produce horsepower and torque gains. They replace the restrictive factory air box and air filter to give you better performance and better engine sound.
Performance & Why It’s a Solid Upgrade
For owners of the Mini Cooper S / Clubman S / JCW models with N18 engine, the stock air intake system works—but it leaves performance on the table.
This intake system opens up airflow, reduces intake air temperature, improves throttle feel and engine sound—exactly what you want when performance matters. The minority gain (~6 HP) might not leap off the page, but the improved responsiveness and sound make it meaningful.
Better engine breathing = sharper response under boost and better real-world feel.
Installation Notes
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Estimated install time: ~1 to 2 hours depending on tool set and familiarity.
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Use factory mounting points; ensure the hood scoop housing is correctly seated to prevent filter ingestion of hot bay air.
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After installation, check for clearance (hood, bonnet extractors) and ensure all factory sensor connections are intact.
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Verify fitment via VIN to ensure your model is the correct one (N18 engine, correct chassis code).
AEM cold air intakes relocate the air filter outside the engine compartment so cooler air can be fed into your engine. Cooler air carries more oxygen, which translates into a more intense explosion in the combustion chamber for more horsepower and torque. AEM Cold Air Intakes include an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration, and performance while allowing easy oil-free cleaning.
AEM 21-721C Cold Air Intake System (Black) — Vehicle-Specific Overview
Vehicle Fitment (N18 Engine Only)
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2011–2013 Mini Cooper S (R56)
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2011–2014 Mini Clubman S (R55)
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2011–2015 Mini Cooper S Convertible (R57)
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2012–2015 Mini Coupe S (R58)
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2012–2015 Mini Roadster S (R59)
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Applicable John Cooper Works variants with the N18 engine
CARB Legal: EO D-670-21 — 50-state legal for qualifying models.
They include a mandrel-bent aluminum intake tube and high quality hardware designed to reduce restriction and reduce intake temperature. The design and components of each intake system vary so consult the installation instructions for more information on the contents of each part number. This Air Intake cannot be sold in California. It is not legal for use in California or other states adopting California emission standards.
Final Verdict
If you own a 2011–2015 Mini Cooper S / Clubman S / John Cooper Works with the N18 engine, the AEM 21-721C is a well-engineered intake upgrade. The build quality is premium, the gains may be modest but tangible, and the installation is straightforward. For the enthusiast wanting better airflow and sound—this is a smart bolt-on.
Justin Anderson –
Truly incredible, you can feel the car pull harder. Definitely having direct air intake it always amazing. Very easy install took about an hour.The only down side I noticed is the new 90 hose fiting for the bottom of the air housing is missing a clip that holds a air line is missing had to use a zip tie to hold it down. This clip is standard is the OEM version.Solid besides missing a clip strongly recommend for anyone looking to do small upgrades
B. Brost –
Awsome kit!! Took about an hour to to install and button everything up, makes for a great change!.. and IAT’s are lowered just a tad. ( would take a bigger intercooler to really change them ) but this allows my car to breathe alot easier, and with the hood scoop, it really has access to clean air.
Jose Luis Olivares Rives –
Me enviaron un filtro que no es el del kit de admisión . Es el segundo kit que compro y el primero venía ok . Este el filtro era más grande y no calza con el adaptador de la manguera y no entra en la caja porta filtro
David p –
Awesome upgrade fit well
Daniel –
This was almost too easy to install. I was genuinely surprised. My butt dyno can’t tell a difference in power but I get more intake noise out of it so it was worth it. It’s a little more expensive than other intakes in the market but it comes with much more. Good purchase overall
J. Holley –
Slammed this onto my wife’s ‘11 mini S and it fit perfect! Car loves the cool air and wife didn’t fuss… win win ! Worth all the money…?????… yea, really turbos need that cold air.Oddly, it rained for a month solid after install. I worried of water getting into intake. After a month of driving it, no prob. It did fine and now it even barks tires on low end. High end has way more go esp in Sport mode. Next to a newer inter cooler, this is a good mod! It’s well made!
Daniel Pedroso de Oliveira –
Exccelent! The best intake system for Cooper S
Robert Noe –
Easy to install, looks awesome! By seat of the pants, can’t tell any performance improvement, but this is the only upgrade I’ve done
Pedro –
Perfecto
Perfecto
WALTER –
Parfait pour Mini cooper R56
Produit de qualité et est parfaitement adapté pour Mini Cooper R56 y compris la version John Cooper Works.L’installation facile et un rendu magnifique, on dirait que c’est monté d’origine.Je recommande ce produit, n’hésitez pas !