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Part:   21-751C

AEM 21-751C Cold Air Intake

AEM Cold Air Intake System
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.7
  • 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 21-751C fits some Honda Accord models. See vehicle applications for details.
The AEM 21-751C 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 Accord 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 relocated to the driver side wheel well 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 mass air flow sensor and vent 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 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 21-751C vehicle applications to determine the legal status for each vehicle.

[More Information on AEM Cold Air Intake Systems]
Specifications AEM 21-751C Product Specifications
Estimated Horsepower Gain20 HP @ 5900 RPM
Replacement Filter21-2147DK
Air Filter ColorRed
Air Filter MaterialNon-woven Synthetic
Air Filter Outlet ShapeRound
Clamps Included4
Clamp MaterialSteel
Clamp StyleRegular
Couplers Included1
Product StyleAEM Cold Air Intake System
Air Filter Height7 in (178 mm)
Intake Pipe Color / FinishGunmetal Gray
Intake Pipe MaterialAluminum
CARB EO NumberD-670-24
Street Legal In All US StatesSee Vehicle Applications
TUV Approved (Europe)No
Weight8.7 lb (3.9 kg)
Product Box Height10.6 in (269 mm)
Product Box Length35.4 in (899 mm)
Product Box Width13.3 in (338 mm)
Mounting Hardware IncludedYes
WarrantyLimited Lifetime

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

Angel Cornejo from Garden Grove, California
February 28, 2019 - Part 21-751C
I purchased this AEM intake for my 2014 Honda Accord V6 coupe. I have to say I was definitely impressed with the sound and performance gains from this intake. My car sounds so much more aggressive especially at higher rpms. The performance gains are also more noticeable at higher rpms. I would definitely recommend this product to anyone with a 9th gen accord V6.
Kodi Young from Gresham, Oregon
August 26, 2016 - Part 21-751C
I own a 2016 v6 Accord 6 speed manual. My car sounds more alive with this intake on. Was an easy install with the instructions. Took 30 minutes. Super quiet til you Get on it and vtec is loud. Highly recommend if you are looking for a well built cold air intake. Thank you so much AEM.
Louis S. from Massachusetts
September 19, 2015 - Part 21-751C
This cold air intake does what it says it does. I ran a 2015 Honda Accord 3.5L (6 speed auto trans) ( 3,300 miles on car) on the chassis dyno before and after install. Before run was not ideal, but I duplicated it for gain results. Pros: gained around 15 Hp & 14 Tq. Fitment. It has increased suction noise, under acceleration, that I wanted from it. Cons: it sounds like shit because of the resonance. The hardware quality is lacking. I had a AEM cold air intake on my Acura 3.2CL years ago, that sounded great. The tubing, I think, was thicker. It felt more robust and didn't have any resonance issues. That was the reason I went with the AEM brand this time... Not impressed at all. I purchased this CAI for personal use and had access to a chassis dyno. Overall max results with this CAI installed: Max Power at the wheels: 255.20 Max Torque at the wheels: 237.02 4 star rating, because it sounds like ...