AEM Induction Cold Air Intake System (21-491C)
SKU: 66270701935

AEM Induction Cold Air Intake System (21-491C)

Sale price$135.00 Regular price$150.00
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

AEM Induction Cold Air Intake System (21-491C)The AEM 21 491C 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 Mazda 6 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

The AEM 21-491C 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 Mazda 6 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 and crankcase breather 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 21-491C 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: 66270701935

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    Majestic
    Whiting, US
    ★★★★★ 3
    Although it was a quality made shirt, not happy with the fit and style.
    Size: X-Large, Color: Grey Stripe
    Order this in an XL size for my son-in-law for Xmas. He isn't overally big, but likes the XL size for a little more roominess. After Xmas he tried it on. Although it was a quality made shirt, he wasn't happy with the fit and style. A no hassle return.
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    Reviewed in the United States on February 23, 2026
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    Tommy Wong
    Dallas, US
    ★★★★★ 5
    Good fit and quality
    Size: Medium, Color: Burgundy 09
    Loved this comfortable shirt, the look quality and fit are perfect with zero fade after a few uses, just to give you an idea of how much I liked it I've already ordered two more shirts.
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    Reviewed in the United States on April 21, 2026
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    Tucker
    Draper, US
    ★★★★★ 5
    The black shirt
    Size: Small, Color: Black 09
    Great fit, wrinkle resistant worth your money. Very very comfortable, quality outstanding. Durable most definitely
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    Reviewed in the United States on April 18, 2026
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    Megan Kuntz
    West Palm Beach, US
    ★★★★★ 4
    Nice shirt, Fabric is revealing
    Size: 3X-Large, Color: Teal 09
    Beautiful shirt. Color is lovely. The material, however does reveal any bumps, lumps, or hair you may have on your skin, even with appropriate sizing. I don't think sizing up would help. Very smooth, stretchy material. Comfortable to wear.
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    Reviewed in the United States on June 16, 2025
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    Kris10
    Charlottesville, US
    ★★★★★ 5
    Great feel and comfort
    Size: X-Large, Color: Red 09
    Great shirt for work and play. Lightweight and Wrinkle resistant. Very comfortable to move around. Son loves the collar style. Fit him perfectly 6’1 and 235.
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    Reviewed in the United States on January 14, 2026

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