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Part:   21-811C

AEM 21-811C Cold Air Intake

AEM Cold Air Intake System
  • 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 21-811C fits some Kia Forte Koup, and Kia Forte5 models. See vehicle applications for details.
The AEM 21-811C Performance Cold Air Intake System produces horsepower and torque gains by improving air flow and drawing in cooler, denser air. It all begins with a cone shaped AEM Dryflow filter which uses a synthetic filter media for outstanding air flow, filtration and performance. By relocating the air filter lower and to the front of the car, cooler and denser air can be accessed. Oiling the filter is not necessary and it can be used up to 100,000 miles before cleaning is needed (depending on driving conditions). Running up to the throttle body is the intake tube which is mandrel-bent to reduce airflow restriction at the bends. It is made of aluminum and is powder coated gray for lasting performance. The restrictive factory air pipe and air box are replaced with this free-flowing air intake system. The factory PCV valve and recirculation hose mount directly on the intake tube. 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 21-811C vehicle applications to determine the legal status for each vehicle.

[More Information on AEM Cold Air Intake Systems]
Specifications AEM 21-811C Product Specifications
Estimated Horsepower Gain7 HP @ 3800 RPM
Replacement Filter21-2157DK
Air Filter ColorRed
Air Filter MaterialNon-woven Synthetic
Air Filter Outlet ShapeRound
Clamps Included3
Clamp MaterialStainless Steel
Clamp StyleWorm Gear
Couplers Included1
Product StyleAEM Cold Air Intake System
Intake Pipe Color / FinishGunmetal Gray
Intake Pipe MaterialAluminum
Street Legal In All US States No
TUV Approved (Europe)No
Weight9.5 lb (4.3 kg)
Product Box Height10.6 in (269 mm)
Product Box Length35.4 in (899 mm)
Product Box Width13.3 in (338 mm)
California RestrictedNot legal for sale or use in California
Mounting Hardware IncludedYes
WarrantyLimited Lifetime

Horsepower gains based on similar vehicle dynamometer test. Results will vary.
WARNING: Cancer and reproductive harm--www.P65warnings.ca.gov