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57-0303-1
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K&N 57-0303-1 Air Intake

57i Series Kits > Performance Intake Kit
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   2 Customer Reviews
  • 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 provides 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 Height5.313 in (135 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeRound
California RestrictedNot legal for sale or use in California
Clamp MaterialStainless Steel
Clamp StyleRegular
Clamps Included2
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-5129
Street Legal In All US States No
TUV Approved (Europe)No
TypeGen I
Weight3 lb (1.4 kg)

K&N 57-0303-1 Air Intake Product Reviews

Friday, September 16, 2016 - Part 57-0303-1
Great filter, comes with everything you need to fit it and the instructions are really clear and car specific. The filter fits perfect and sounds great. The noise level is discreet on normal driving but gives an awesome growl when it hits the power and has improved the acceleration a lot. It was delivered quickly and I would definitely recommend it

Chris Harris
England
Friday, March 20, 2015 - Part 57-0303-1
I bought an 57i air intake kit to my 2005 Ford Focus 1,6 TiVct. Installing the conversion kit was exceptionally easy, thanks to complete set of parts needed. Also fresh air hose needed to bring air under the bonnet was included. When i started my car first time after the installation i noticed great improvment in acceleration. Motor takes revs much better than before. Very satisfied with the outcome, two thumbs up! Only thing that disappoints me was that the package did not include the decals that should be in the box. I was looking forward to complete the installation with a neat k&n decal in my cars rear window.

Christian Bäro
Finland