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57i Series Kits > Performance Intake Kit

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57-0303-1
 
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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 always 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]
  • 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®

Product Specifications

Air Filter ColorRed
Air Filter Height5.313 in (135 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeNot Flanged
California RestrictedNot legal for sale or use in California
Clamp MaterialStainless Steel
Clamp StyleRegular
Clamps Included2
Intake Pipe Color / FinishBlack
Intake Pipe PortsAll intake tube ports needed for the specified applications are included
Mass Air Flow Sensor Adapter IncludedMass Air Flow Sensor Adapter Included When Required
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
Vacuum Tubing IncludedNo
Weight3 lb (1.4 kg)


Customer Feedback


I love this air filter, the way it makes my 2014 Ford Focus ST sound and perform is amazing. Can't thank my amazing girlfriend enough for getting me this, this past Father's Day. Awesome product.
Paul Waters, Houston, Texas
This isnt so much about the improvement of filtration as is it about the durability.I was changing the oil in my 2010 Ford Focus and I took my K&N Air Filter out to wash it.As I normally do I have a back up stock filter to put in my car while my K&N dries overnight.Not thinking as I backed out of the garage I drove over top my K&N flat panel filter drying in the sun.I reluctantly got out looked under the car and there it was tire track straight across the filter and not even a dent in the screen on it I was amazed.I had to write an tell you about how what could have been a catastrophe turned out to make an even bigger believer in K&N filters out of me I have one in my truck, My race car, my Focus and my fourwheeler.Id never be without one Thanks Again.
Charles Walker, Shepherdsville ,Kentucky
Installed on a 2014 Ford Focus ST. I couldn't be happier! Very easy to install and super fast shipping. Noticeable throttle response improvement. Much better sound than stock filter (which can only lead one to believe it has much better air flow). Nearly 4mpg gained (VS stock filter, data gathered over 2 weeks, driving the same route at roughly the same speed 7 days a week). All and all I couldn't be happier. I've been so impressed with it that I talked my dad into getting one for his 2010 Titan. You get a nice little K&N decal in the box with this one. I stuck it on my airbox :D.
Matthew Griggs, South Carolina