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K&N Engineering - The World's Best Cotton Air Filter

K&N Cotton Air Filter Products

High Performance Cotton Air Filters, Oil Filters & Air Intake Kits for your car, truck, SUV, motorcycle, and more!  

The #1 Reusable Cotton Air Filter in the World! - Invented by K&N more than 40 years ago.

At K&N, our high-flow cotton air filters are made of four to six layers of cotton gauze sandwiched between two epoxy-coated aluminum wire screens. The cotton is treated with a special grade of K&N oil causing tackiness throughout the cotton's microscopic strands. The nature of the cotton allows high volumes of air to pass through the filter, and when combined with the tackiness of the oil creates a powerful filtering media that ensures engine protection.
Cotton Air Filter Fibers
Cotton Air Filter Fibers


K&N FilterCharger® Replacement Air Filters Made With Cotton

K&N replacement air filters are designed to increase power & acceleration while providing excellent filtration. K&N cotton air filters are available for most cars, trucks, motorcycles, ATV's, and more. K&N O.E. replacement air filters come with the K&N Million Mile Limited Warranty® and will be the last cotton air filter your vehicle will ever need. Made with a washable cotton, K&N reusable air filters can be used over and over again.
  • Replacement Cotton Media Air Filters for most cars, trucks, motorcycles, ATV's, and more!
  • Designed to increase horsepower and torque (acceleration)
  • Washable and reusable cotton filter media
  • Will NOT void US vehicle warranty
  • Million mile limited warranty 
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K&N Replacement Cotton Air Filters
K&N replacement air filters are made with a reusable cotton media.


K&N High Performance Air Intake Kits With Cotton Filters

K&N cold air induction kits add power to your vehicle while protecting your engine from harmful contaminents. K&N air intakes are available for cars, trucks, motorcycles, SUVs, RVs, ATVs, and more. Adding power and performance is easy with K&N air intake systems because they simply bolt on to your vehicle using common hand tools.
  • Fuel Injection Performance Kits - FIPK®, Typhoon, 77 Series, AirCharger® and 57i air intake kits
  • Replaces restrictive factory air filter and air intake system
  • Designed to increase horsepower and acceleration by as much as 10% 
  • Works with original equipment computer and emission control systems
  • All K&N air intake kits come with a genuine K&N high-flow cotton air filter
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K&N Performace Air Intakes
K&N performance air intake systems include a K&N reusable cotton air filter.

K&N Performance Gold® Oil Filters

  • Wrench nut for quick and easy removal 
  • Meets or exceeds engine filtration requirements
  • Heavy duty construction with increased wall thickness for higher burst strength
  • High oil flow rate
  • Learn More About K&N Premium Oil Filters
K&N Performance Gold Oil Filters

Over 800 different replacement cotton media air filters
for virtually every vehicle on the road.

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