K&N 57-0181

57i Series Kits > Performance Intake Kit
List Price: $142.84
Your Price: USD $91.99

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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 Height3.938 in (100 mm)
Air Filter MaterialCotton Gauze
Air Filter Outlet ShapeNot Flanged
California RestrictedNot legal for sale or use in California
Clamp MaterialSteel
Clamp StyleRegular
Clamps Included1
Filter MaterialCotton Gauze
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-9820
Street Legal In All US States No
TUV Approved (Europe)No
TypeGen I
Weight2 lb (0.9 kg)

Customer Feedback

Be the first to review part 57-0181
1997 F350 8ft crew 7.5 gasser auto, single wheel, pulls 8000lbs of toy hauler and firewood. Only add is a B&M Trans Switch assembly and a multi quart trans pan and lil dents and scratches all the kids swear makes it faster now dad. The truck has 100k miles and we just installed new fuel pumps it needed she was still not acting like a big block motor, had torque but just wasent producing that big block  power we all expect. After installing the C.A.R.B. Approved K&N 52-2516 FIPK and replacing the stock muffler with a 2 chamber (Brand) we now feel it performs better than when it was new. The increased throttle response and report really WOWED us and she pulls like never before, we just couldn't be happier. DO NOT be the ********* we were and try the metric nut on the sae stud located on the filters chrome end, the sae nut is included and a quick check before wrenching is all it takes for a very clean and sturdy install. Check the 4 mass air flow adapter plate nuts and bolts the filter mounts to also, as we found they loosened up when the new assembly went through several heat cycles, once retightened they have remained in spec. We would indeed recommend this kit to any 460 gas drivers out there to spice up the performance and sound of their old ford. We are indeed considering the blue pre filter to spice up under the hood and prolong the filter use between servicing. What more can be said except, have you ordered it yet? no, why not. lol

Mad Marx
Ordered my filter for a 2010 Ford F-150 5.4L. Filter came in a few days, fit perfect. Been using K&N air and oil filters for some time now. It increased mpg by 2 and noticed better acceleration. Very happy. If you haven't tried K&N filters, order one and you be the Judge. Order-Arrive-Install-Enjoy.

Ephrata, PA
After reading other reviews I decided this was the intake for my 2013 Ford Focus with the 2.0L Duratec engine. Great sound and noticable performance, plus better fuel economy. The numbers don't lie. The provided dyno info was almost exact when I had put mine on the dyno. Nearly 10hp gain through the meat of the power curve.