SKU: 46636113370

AEM Induction Cold Air Intake System (21-685C)

$180.00 $200.00
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 14 - Aug 19

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Description

AEM Induction Cold Air Intake System (21-685C)The AEM 21 685C Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicles restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno tested to fit specific Honda Civic SI and Acura ILX 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

The AEM 21-685C Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicles restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno-tested to fit specific Honda Civic SI and Acura ILX 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 engines factory emissions control devices including the mass air flow sensor, a couple replacement silicone breather hoses as well as a replacement radiator 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 AEMs 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 21-685C vehicle applications to determine the legal status for each vehicle.

Features:

  • Delivers more oxygen to the combustion chamber by drawing in cooler air
  • Custom designed and engineered to deliver maximum power for each specific vehicle
  • Every system includes the innovative, oil-free, high-flow AEM Dryflow air filter
  • Dyno-tuned air intake pipe constructed of mandrel-bent 6061 aluminum for smooth airflow
  • Comes complete with all necessary mounting hardware and comprehensive installation instructions
  • Backed by the AEM limited lifetime warranty
  • Proudly manufactured in the USA
    • Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 46636113370

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    4.1 ★★★★★
    Based on 9 reviews
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    Product Reviews
    M
    Verified Purchase
    Mrs. C
    Carnegie, US
    ★★★★★ 5
    These are quality materials!
    The design and materials are above average. They fit great and are so comfortable. I have nerve damage and need open toes. These work perfectly. The colors are cute and did not fade upon washing. I will definitely order more, now that I’ve received my “trial” set. lol
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on October 9, 2023
    A
    Verified Purchase
    avalancheryder
    San Leandro, US
    ★★★★★ 5
    Absolute game changer for chronically dry feet/cracked heels
    Size: S (up to size 7)-Beige
    I had recently bought a pair of silicone heel/ankle wraps to fill out my boot a little since I noticed my heels were lifting when I was skating. I tested them out around the house and noticed they left my heels softer while the rest of my sockless feet got quite dry. So I got these full foot silicone socks to see the effect of having my whole foot covered. I slather the entirety of my feet with Dr. Scholl's Severe Cracked Heel Restoring Balm (love how convenient it is to apply it to my feet with the solid stick form) and then slip them into these silicone socks. After just a couple hours, when I pull out my feet they're (a teeny bit sweaty at first), but then overall soft and smooth and have absorbed the balm fully leaving barely any residue in the silicone sock. I find these silicone socks generally comfortable; I wear them in the evenings while relaxing on the couch, take them off after a couple hours and let my feet breathe a bit, and then reapply my balm and socks and wear them to bed. If I wake up in the middle of the night, which I almost always do (not because of the socks), I'll take the socks off and allow my feet to breathe again. I wear a woman's size 6 shoe and the small size is pretty comfortable. However, I made the mistake of wearing them while being on my feet for a couple hours straight during household chores -- they must've somehow cut off my circulation a bit with the standing, so I wouldn't recommend wearing these silicone socks while being active. And since they're not exactly my foot size, they slide around sometimes and will start to feel tight at my big toe. But if that happens, I just tug on the toe area of the sock to give my big toe more wiggle room and problem solved. Prior to wearing these socks, I was soaking and doing heavy duty exfoliation of my feet every week. These socks seem like they'll work to help me extend the time between soakings and exfoliations. The 5 pack is a great value. So far none have torn, so they seem rather durable. Not sure what I could even do to tear a hole in these.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on January 16, 2026
    B
    Verified Purchase
    Beverly Durham
    Fort Morgan, US
    ★★★★★ 5
    Works wonders
    Size: M (up to size 9)-Beige
    Works wonders for dry feet, like really dry, hard feet.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 23, 2026
    T
    Verified Purchase
    Therapy by the Sea
    Natrona Heights, US
    ★★★★★ 4
    EXCELLENT FEET MOISTURE PROTECTION
    Size: S (up to size 7)-Beige, Size: S (up to size 7)-Beige
    Why did you pick this product vs others?: I have burns on my feet and needed something that I could put burn creme on and still walk around in with. I tried other silicone footsie but they would teae really easily. So far these are doing really well for this purpose. They are holding their shape too. The only caution I have is the same with all silicone footsies: They can be slippery on wet floors, so also wear with socks over them. The biggest issues is when they say a size they mean it. The silicone used in these have little give in them, so they won't stretch out and loose their shape. That can be a good thing, or not so good, depending on how well they fit your feet and what your intent is with wearing these. The other issue is if they fit snug around those toes, that tends to be where the first tear in the material will happen. Because of how these are made, the tear is actually more like cracking in the material and once it occurs you won't be able to get much use out of the sock after that. If you are planning to wear them around the house or for long term use, I suggest going up a size or look for the toeless options.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on July 5, 2025
    S
    Verified Purchase
    Shawna
    Fort Morgan, US
    ★★★★★ 3
    Silicone socks
    Size: M (up to size 9)-Beige
    The socks are sized large. The quality of the silicone is good. But they slide around on your feet if you try to walk, making them difficult to use and a bit uncomfortable. Unless you are able to sit for long periods of time the likely will not work well. Recommend looking for a better value.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on October 27, 2024

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