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Free Shipping Over $299.99

Free Shipping Over $299.99

Orders of $299.99 or more ship free within the continental U.S.
Shipping to Alaska and Hawaii is additional and not included.
We do not ship international at this time.

Shipping Policy

AEM 17-21 Civic Si Gunmetal Cold Air Intake
Part Number: 21-830C

★★★★★ ★★★★★ 1 Reviews
AEM 17-21 Civic Si Gunmetal Cold Air Intake-A1
AEM 17-21 Civic Si Gunmetal Cold Air Intake-A2
AEM 17-21 Civic Si Gunmetal Cold Air Intake-A3
AEM 17-21 Civic Si Gunmetal Cold Air Intake-A4
AEM 17-21 Civic Si Gunmetal Cold Air Intake-A5
Images may be for reference only

AEM 17-21 Civic Si Gunmetal Cold Air Intake
Part Number: 21-830C

★★★★★ ★★★★★ 1 Reviews
$399.99 & Free Shipping

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Not legal for sale or use in California on any pollution controlled motor vehicles.
4 In Stock

Product Details

Part Number: 21-830C
Brand: AEM Intakes
Color: Gunmetal
CARB Approved: No

AEM 2017-2021 Honda Civic SI Gunmetal Cold Air Intake System allows your engine to breath more air compared to the restrictive factory air intake housing. It is designed, tuned, and dyno-tested to produce more horsepower and torque.
  • Estimated Horsepower Gain 11.3 HP @ 4503 RPM
  • Replacement Filter 21-201DK
  • Gunmetal Gray
  • Dyno-tested to produce more horsepower and torque
  • Heat shield with edge trim lining
  • 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



Not legal for sale or use in California on any pollution controlled motor vehicles. See http://www.semasan.com/emissions for state by state emissions requirements.
There is a 5% cancellation fee if you order this product and want to ship it to the state of California.

Due to the manufacturer's price control policy, this item may be excluded from promotions and discounts

WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.

Vehicle Fitment

Honda Civic
2017 Honda Civic Si
2018 Honda Civic Si
2019 Honda Civic Si
2020 Honda Civic Si

1 Reviews ★★★★★ ★★★★★

★★★★★ ★★★★★
5/5.00 Stars out of 1 Reviews
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Great intake for the money
Carmine Ferrendi | January 6th, 2021
Fast shipping, great product, easy install.