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Item #:
425481
AEM (21-721C) Cold Air Intake System, Black
Item #:
425481
PKR 237133
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AEM Cold Air Intake Systems are designed to produce horsepower and torque gains, improving performance and engine sound.
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What Stands Out
Enhanced Airflow
The AEM 21-721C Cold Air Intake System significantly improves engine airflow, boosting performance and efficiency over stock parts, thus providing a noticeable increase in horsepower and torque.
Durable Build
Crafted from high-quality materials, this cold air intake system is designed to withstand harsh conditions while maintaining optimal performance, ensuring longevity and reliability for your vehicle.
Easy Installation
Designed for straightforward installation, this intake system includes all necessary hardware and instructions, allowing users to upgrade their vehicle's performance with minimal hassle and without professional help.
Product Details
- Produces horsepower and torque gains
- Tuned and dyno-tested for improved acceleration and engine sound
- Features low restriction aluminum tubing
- Includes washable and reusable oil-free filter media
- Designed to fit specific Mini Cooper S, S Clubman, and John Cooper Works models
- Air filter lasts up to 100,000 miles before cleaning is required (depending on driving conditions)
| Brand Name | AEM |
| Model Number | 21-721C |
| OEM Equivalent Part Number | 21-721C |
| Manufacturer Part Number | 21-721C |
| Global Trade Identification Number | 00024844346469 |
| Manufacturer | AEM |
| UPC | 024844346469 |
| Unit Count | 1 Count |
| Included Components | Cold Air Intake System |
| Item Type Name | AEM (21-721C) Cold Air Intake System |
| Item Weight | 13.3 Pounds (6.03 kg) |
| Item Dimensions L x W x H | 24.38"L x 18.38"W x 16.75"H (61.9 x 46.7 x 42.5 cm) |
| Product Grade | Performance Part |
| Fit Type | Vehicle Specific Fit |
| Automotive Fit Type | Vehicle Specific Fit |
| Brand | AEM |
| Product Dimensions (L x W x H) | 24.38"L x 18.38"W x 16.75"H (61.9 x 46.7 x 42.5 cm) |
| OEM Part Number | 21-721C |
Who Should Buy?
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Performance Enthusiasts
Ideal for users seeking enhanced engine performance and increased horsepower through improved airflow and filtration.
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DIY Installers
Perfect for car owners comfortable with installing aftermarket parts, as it includes all necessary hardware for installation.
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Off-Road Drivers
Great choice for off-road enthusiasts who need a durable intake that can withstand rough conditions and improve airflow.
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Budget Shoppers
Not ideal for users looking for low-cost options, as it may be pricier than typical stock intake systems.
Product Description
AEM (21-721C) Cold Air Intake System, Black
About This Item
Upgrade your vehicle's performance with the AEM 21-721C Cold Air Intake System in sleek black. This high-quality intake system is designed to optimize airflow, providing your engine with increased horsepower and torque. The AEM Cold Air Intake System is engineered to replace your vehicle's restrictive factory air box and intake tube.
By utilizing a large-diameter tubing and a specially designed air filter, this system ensures a steady stream of cool and dense air directly to the engine. The result is improved combustion and more power throughout the RPM range. Not only does the AEM 21-721C Intake System enhance your vehicle's performance, but it also adds a touch of style under the hood with its eye-catching black finish.
AEM, known for their performance aftermarket parts, has ensured that this intake system combines both form and function. Installation of the AEM 21-721C Cold Air Intake System is straightforward, thanks to the included detailed instructions and all the necessary hardware. You won't need to be an experienced mechanic to enjoy the benefits of this upgrade. Experience the difference in your vehicle's performance with the AEM 21-721C Cold Air Intake System. Whether you're looking to add some extra power to your daily commute or want to enhance your vehicle's performance on the track, this intake system is a perfect choice.
Trust in AEM's reputation for quality and innovation to take your driving experience to the next level.
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What is the AEM 21-721C Cold Air Intake System?
Answer: The AEM 21-721C Cold Air Intake System is designed to improve the performance and efficiency of your vehicle's engine by allowing it to breathe better. It replaces the factory air intake system with a high-flow design that helps increase horsepower and torque.Category: overviewConfidence: high -
Question:
How do I install the AEM 21-721C Cold Air Intake System?
Answer: The installation of the AEM 21-721C Cold Air Intake System typically requires basic hand tools and can be completed in about 1-2 hours. Detailed instructions are included in the package, and it's recommended to follow them closely for best results.Category: setupConfidence: high -
Question:
What vehicles is the AEM 21-721C compatible with?
Answer: The AEM 21-721C Cold Air Intake System is specifically designed to fit select models of certain vehicles. It is important to verify compatibility with your vehicle's make and model to ensure proper installation and function.Category: compatibilityConfidence: medium -
Question:
What are the specifications of the AEM 21-721C Cold Air Intake?
Answer: The AEM 21-721C features a lightweight design with an aluminum intake tube and an AEM washable and reusable air filter. Specific performance specifications, such as horsepower gain, may vary based on engine type and condition.Category: specsConfidence: medium -
Question:
What comes in the box with the AEM 21-721C Cold Air Intake System?
Answer: The AEM 21-721C Cold Air Intake System package typically includes the intake tube, air filter, necessary mounting hardware, and installation instructions. Always check the packaging upon receipt for completeness.Category: accessoriesConfidence: high -
Question:
How do I clean and maintain the AEM 21-721C air filter?
Answer: The AEM air filter is washable and reusable. To clean it, use AEM's filter cleaning kit and follow the instructions provided. Regular maintenance will help maintain performance and airflow.Category: maintenanceConfidence: high -
Question:
What should I do if the AEM 21-721C Cold Air Intake System does not fit my vehicle?
Answer: If the AEM 21-721C Cold Air Intake System does not fit your vehicle as expected, you should first review the installation directions and vehicle compatibility. If issues persist, contact AEM customer support for assistance.Category: troubleshootingConfidence: medium -
Question:
Are there any safety precautions for installing the AEM Cold Air Intake?
Answer: When installing the AEM 21-721C Cold Air Intake, ensure the vehicle is turned off and cool. Take care while working with tools and moving parts to avoid injuries. It’s advisable to wear safety glasses during installation.Category: safetyConfidence: high -
Question:
What is the warranty policy for the AEM 21-721C Cold Air Intake System?
Answer: AEM offers a limited warranty on the 21-721C Cold Air Intake System. The warranty typically covers defects in materials and workmanship for a specific period. For details, refer to the warranty information included in the product packaging.Category: warrantyConfidence: medium -
Question:
Can I return the AEM 21-721C Cold Air Intake System?
Answer: Yes, you can return the AEM 21-721C Cold Air Intake System within a specified period if it is unused and in its original packaging. Always check the return policy of the retailer from which you purchased the product.Category: returnsConfidence: medium -
Question:
Where can I buy the AEM 21-721C Cold Air Intake System?
Answer: The AEM 21-721C Cold Air Intake System is available at various automotive retailers and online marketplaces. It's advisable to purchase from authorized sellers to ensure authenticity and warranty coverage.Category: shippingConfidence: high -
Question:
Does the AEM 21-721C come with any software or app?
Answer: The AEM 21-721C Cold Air Intake System does not come with dedicated software or an app. It is a standalone product designed for improved air intake without the need for additional digital interfaces.Category: softwareConfidence: high -
Question:
What is the expected performance improvement from the AEM 21-721C?
Answer: The performance improvement from using the AEM 21-721C Cold Air Intake System may vary based on the vehicle and its existing setup. Users often report increases in horsepower and torque, but specific gains depend on many factors.Category: overviewConfidence: medium -
Question:
Are there any different models of the AEM Cold Air Intake System?
Answer: AEM offers various cold air intake models that cater to different vehicle makes and models. Each model may have specific features or design elements tailored to enhance performance under different conditions.Category: otherConfidence: medium -
Question:
How does the AEM 21-721C compare to other cold air intakes?
Answer: The AEM 21-721C Cold Air Intake System stands out for its design, materials, and potential performance benefits. However, comparisons with other brands or models should consider specific vehicle needs and performance goals.Category: otherConfidence: medium
AEM Ram Air Kit 21-721C Editorial Review
The AEM 21-721C Cold Air Intake System is a high-quality product that is designed to improve the performance of your Mini Cooper S. This intake system includes everything you need to replace the stock unit and comes with an air track that directs air from the hood scoop to the new filter box. The installation is easy and takes about an hour. The intake system is well made and comes with a bolt-on hood air tunnel. You can feel the car pull harder and it's worth the investment. However, some customers have reported a few issues with the product.
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Pros
- Easy to install
- Improves performance
- Bolt-on hood air tunnel included
- Directs air from the hood scoop to the new filter box
- Well made
Cons
- Missing a clip that holds an air line
Platform Trust & Buyer Confidence
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Mohammad
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“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
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22 July 2026 · via Trustpilot
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PKR 237133
Order now and get it around Friday, August 28
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Features & Benefits
- Increases horsepower and torque for enhanced performance.
- Replaces restrictive factory air box for better airflow.
- Relocates the air filter outside the engine compartment for cooler air intake.
- Includes a washable, oil-free AEM Dryflow synthetic air filter.
- Features a mandrel-bent aluminum intake tube to reduce restriction.
- Guaranteed for the life of your car or truck.
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