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57-0021-1
$91.99 USD
MSRP $167.99 45.2% Off
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K&N 57-0021-1 Air Intake

57i Series Kits > Performance Intake Kit
  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Replaces entire factory air intake system
  • Not legal for highway use in states adopting California emission regulations
  • Washable and reusable lifetime air filter
  • Lasts up to 100,000 miles before service is required (depending on driving conditions)
  • Easy to install, usually in 90 minutes or less
  • K&N Million Mile Limited Warranty®
K&N 57i Series induction kits are specifically designed for each different vehicle and will free your car from the size restriction that comes with the factory air box. These economical kits can take a variety of different forms based on vehicle characteristics and available space under the hood. Each kit is designed to provide power throughout the RPM range. The extra surface area of these open-air air filters provide even more airflow at lower restriction than a K&N O/E replacement filter which is limited to the size of the factory air box. The larger air filter also captures and holds more dirt increasing its service life before a cleaning is required (up to 100,000 miles). The filter is either directly attached to the engine carburetor or throttle body or indirectly through a tube assembly running from the filter to the engine. All adapters are made from high quality materials such as steel, aluminum, silicon or reinforced nylon to ensure long life. 57i Intakes are not legal for use in California and other US States adopting California emission standards.

[More Information on K&N 57i Induction Systems]

Product Specifications

Air Filter ColorRed
Air Filter Height5.188 in (132 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
California RestrictedNot legal for sale or use in California
Clamp MaterialStainless Steel
Clamp StyleRegular
Clamps Included1
Intake Pipe Color / FinishBlack
Intake Pipe MaterialFlex Hose
Product Box Height9 in (229 mm)
Product Box Length9 in (229 mm)
Product Box Width9 in (229 mm)
Product Style57i Series International Kits
Replacement FilterRC-9210
Street Legal In All US States No
TUV Approved (Europe)No
TypeGen I
Weight2.2 lb (1 kg)

Customer Feedback

Great product! Fit perfect and works better than the stock air cleaner. I have a K&N air cleaner in my Ford diesel pick up and it works great.

James Holcomb
Washington
Installed the cold air intake in my 2014 Ford Explorer Sport. Even with the turbo, the response is improved and the sound is awesome!

PK
Knoxville, Tennessee
Excellent product. Received it in 1 day....FREE shipping. Easy install with easy to follow instructions. Sounds great and immidiate improvement in throttle response. I can't really feel the HP gain but definitely notice the torque gain. Highly recommend. IMPORTANT: You need a 3/4 inch drill bit if your sensor is the push in type. For some reason a Ford Fusion has 2 different types of sensors. I had my stock parts removed and had to get a buddy to run me out and get a drill bit. Other than that, 45 mins to install.

Trent
Toronto, Canada