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AEM 21-792C Cold Air Intake System, (Carb Compliant)

Free shipping on orders over $29.99

$349.99

$ 99 .00 $99.00

In Stock

About this item

  • 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)


The AEM 21-792C 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 Honda Civic 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 placed into the original air box space and is protected by a heat shield which is designed to reduce intake air temperature and increase horsepower. The air intake tube 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 and engine vent line. 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 and it 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 21-792C vehicle applications to determine the legal status for each vehicle.


Jody Ryals Jr
Reviewed in the United States on September 24, 2024
Bought it a month ago just installed the AEM intake today so I haven’t had chance test it out.
Andrew Nguyen
Reviewed in the United States on May 11, 2024
Car: 2017 Honda CivicEngine: 2.0L K20C2TL;DR: Great quality product, have used it for over a year and installation was straightforward; Affordable upgrade for better driveability and sound, minimal HP gains, maintains fuel efficiency, and is a durable CAI with no issues; CARB legal in California (EO: D-670-26) but not shippable via Amazon.Installation:I purchased and installed the AEM 21-792C Cold Air Intake in April 2023. The installation process was pretty straightforward as the kit came with an instructions manual. The main difficulty was removing the factory airbox as some of the screws were stripped and had to be taken out with other methods, especially with the MAF sensor. I had to do a transmission fluid change at the same time, so it was rather convenient. The AEM CAI is a tight fit, but I didn’t have any major difficulties in installing it. It took around 1.5 hours to fully complete the installation.Performance:Do not expect huge horsepower gains as most CAIs have very marginal improvements to overall HP. According to AEM, there is an increase of ~5-7 HP, which equates to about a 3.1%-4.4% gain in power. You will notice a slight increase in throttle response, which does make the car feel more responsive. Another benefit is the deeper intake noise and the enhanced sound, which might be worth it if you want a more aggressive sound.Durability:After 1 year of use, I’ve inspected the CAI consistently and can confirm that the parts are of great quality. Besides minimal wear and tear, there are no issues or damaged areas and the CAI has held up very well. The only addition I made was installing the Air Filter Wrap, which protects the exposed filter from water and larger particles. Not entirely necessary, but it gives me some ease of mind. There is a limited lifetime warranty, so do keep that in mind.Value and Worth:The CAI is a relatively affordable modification compared to other aftermarket modifications for the car. If you appreciate the auditory and visual enhancement, then you might consider the investment to be worthwhile. The HP gains are minimal, but there are noticeable improvements in driveability and engagement. My MPG has not changed much as I still get ~28-30 MPG (city & highway combined), but that heavily depends on your driving style. I would not purchase this if your car still has a warranty, as it will void it, so be sure to consider your options.Final Thoughts:I thoroughly enjoy the AEM CAI, and definitely felt it was worth it for me. CAIs are not meant to drastically increase performance, especially with a naturally aspirated engine like ours. But, it is a great entry-level upgrade that offers improvements to my driving experience and a chance to learn more about the vehicle.This is more like a “future-proofing” modification, especially if you are interested in adding additional aftermarket parts. Honestly, if you just want a little more sound without the hassle, just get a drop-in filter the next time you have to change your air filter (which is considerably more affordable). Otherwise, the AEM CAI is a great option if the price is right and you feel like it’s worth the upgrade.**Note for California Buyers:The AEM CAI is CARB legal in California, the EO number is: D-670-26. Be sure to install the CARB EO sticker onto your CAI in order to pass your smog inspections.As for shipping, Amazon does not ship CAIs to California due to the CARB restrictions. I spoke to both an AEM and an Amazon Representative, who confirmed that the CAI is CARB legal, but the seller (Amazon) restricts shipping due to legal complications - even if it is CARB legal. You can either: 1) Purchase directly from the AEM website or 2) Have the CAI delivered to another valid shipping address and have it delivered to you. You might consider these options depending on the price point or discounts.
Carlos Alberto Contreras Salazar
Reviewed in Mexico on March 31, 2024
El paquete llego sin el estuche pequeño que aparece en la descripción
Eric M.
Reviewed in the United States on November 20, 2024
Really make your car sound more aggressive. Highly recommend
Griffin Ayres
Reviewed in the United States on August 20, 2023
The media could not be loaded.
Alex Hernandez
Reviewed in the United States on March 22, 2023
The intake is pretty easy to install, hardest part is placing on throttle body and the filter but it is manageable, im familiar with installs tho. The value it great for the money love this product
Eduardo padron
Reviewed in Mexico on November 29, 2023
Suena muy bien, si hay una diferencia de respuesta en el vehículo, obviamente si quieres algo más notorio, debes reprogramar la computadora para que así trabaje mejor. Si hay un cambio en cuanto al consumo de combustible, pero, es lógico, a mayor aire y potencia, mayor consumo de combustible. Aclaro, no es exagerado el consumo. 100% recomendable.
Marco Salazar
Reviewed in Mexico on October 30, 2022
Quedo Perfecto en mi civic 2022 2.0 aspirado
Tamer
Reviewed in Canada on October 2, 2022
Nice product, relatively easy install, cleans up your engine bay and adds flare to it, you can feel the car breath better and adds acceleration response and nice sound, would recommend to any civi owner
Customer
Reviewed in the United States on July 23, 2021
Bought just yesterday & installed today. Love this product for my Honda-Ex so far. Sounds amazing. Took about an hour to install properly. Definitely would recommend.
Customer
Reviewed in the United States on March 12, 2021
Worked perfect for my 2017 Honda Civic Ex. Made the engine sound like a growl and a tiny bit better throttle response. Very good for something you just bolt on!!
Bryan jessee
Reviewed in the United States on April 19, 2021
Easy to install definitely worth the money
daryl
Reviewed in Canada on September 3, 2020
This was an awesome product,shipping was fast will be buying from them again