K&N Automotive Air Filters

Adding vehicle performance and excellent engine protection is easy with K&N automobile air filters

Why Buy a K&N Air Filter

  • Designed to Increase Horsepower
  • Easy to Install Drop-in Design
  • Lifetime Reusable
  • Million Mile Limited Warranty®
  • Lasts up to 50,000 Miles Between Servicing
  • K&N Filter Reviews
K&N air filter features
  1. Durable Urethane Panel Construction - Made to last the life of your vehicle.
  2. Pleated High Flow Filter Media - Improves performance by allowing more air into your engine.
  3. Epoxy Coated Aluminum Mesh - Helps protect filter media.
  4. Pre-Oiled Cotton Gauze - Ready to install out of the box.
  5. Designed for Optimal Seal - Prevents unfiltered air from passing through.

Reusable Air Filter

K&N Reusable Air Filter
Adding vehicle performance and excellent engine protection is easy with K&N automobile air filters

A K&N replacement filter is designed to improve vehicle performance, provide excellent engine protection and last the life of your car, truck, motorcycle, ATV and more. K&N engine filters are easy to install and come with the worry-free K&N Million Mile Limited Warranty®.

Designed to Increase Horsepower

K&N Filters are Designed to Increase Horsepower
K&N automobile filters are designed to increase horsepower and acceleration.

K&N automotive replacement air filters are designed to add horsepower and acceleration to your car or truck by providing up to 50% more air flow. More air flow can result in crisper throttle response and more torque throughout the engine RPM range. K&N OE replacement filters are made up of multiple layers of oiled cotton filter media that not only provide superior air flow but also excellent filtration to ensure long engine life.

K&N Filters are Easy to Install

K&N replacement filters are made for virtually every vehicle on and off the road and they are custom designed to fit into your specific vehicle's factory air box. Instead of swapping out your old paper air filters over-and-over again, with K&N you simply drop in a K&N replacement air filter once and you've boosted the lifetime performance of your vehicle in as little as 5 minutes!

Lifetime Reusable Air Filters

K&N replacement engine filters last up to 50,000 miles between servicing, depending on driving conditions. With the K&N Filter Cleaning Kit you can easily clean and re-oil your air filter bringing it back to brand-new condition and ready for another 50,000 miles of use. Your one K&N filter is designed to last for the lifetime of your vehicle which can save you a bundle of money in the long-run and eliminate the waste generated from buying and disposing countless paper air filters.

K&N Million Mile Limited Warranty
K&N replacement air filters come with a 1,000,000 mile limited warranty.

K&N auto filters are guaranteed to perform for up to10 years or 1,000,000 miles without needing replacement. For full details visit the K&N Million Mile Limited Warranty page for more details.

K&N automotive filters offer an optimal blend of high air flow, filtration efficiency, durability and dust capacity. K&N high flow filter media has been tested in our own in-house laboratories and by independent labs using the ISO5011 air filtration standard developed by the Society of Automotive Engineers. Our goal at K&N is to design reusable filters with the most possible airflow while providing guaranteed engine protection.

Carl and his million mile truck with one K&N air filter installed

K&N is dedicated to providing quality air filter products that meet or exceed your high performance and high filtration demands. K&N uses independent testing labs in addition to conducting tests using our own state-of-the-art in-house testing laboratory. The quality of K&N filters can also be seen outside the laboratory. Carl Judice, of New Iberia, Louisiana, drove more than one million miles with a single K&N air filter installed in his three-quarter ton Chevy pickup. Carl points out that he has never had to rebuild the engine or remove the cylinder head from his trusty pickup truck. Customer satisfaction along with real-world testing doesn't get any better than that.

Fuel economy testing and mileage claims are not as cut and dry as they may seem. The EPA's website states, "EPA's fuel economy estimates are designed to allow consumers to comparison shop. Your fuel economy will almost certainly vary from the EPA's fuel economy rating. This is based on a number of factors, such as weather, road conditions, your driving and maintenance habits, and your use of air conditioning." Many exaggerated claims are found in the marketplace by automotive product manufacturers claiming to improve vehicle gas mileage. K&N does not make any general fuel economy claims. We simply encourage you to try our washable filter products for yourself.

A K&N reusable filter is designed with four to six layers of cotton gauze media sandwiched between two aluminum wire screens. The cotton media is then treated with a specially formulated grade of filter oil that causes tackiness throughout the cotton's microscopic strands. The cotton in a K&N replacement air filter allows high volumes of airflow, and when combined with the tackiness of the filter oil creates an efficient filtering media that ensures engine protection.

The K&N Consumer Protection Plan goes a step further than the K&N Million Mile Limited Warranty. At times, the performance aftermarket has been plagued by automotive manufacturers and auto dealers that may attempt to discourage you from modifying your vehicle. They would prefer that you buy OE parts and not customize your car or truck and have even voided their own manufacturer's warranty due to vehicle modifications. K&N and the Magnuson-Moss Warranty Act protect consumers from such denied warranty claims. When you buy a K&N OE replacement filter or air intake system you can be confident your vehicle's warranty will remain in effect. If you encounter a dealership that wants to void your warranty because of one of our products, K&N will resolve the issue so you won't have to. We believe K&N makes The World's Best Air Filter and we stand behind that claim 100 percent.

Consumer Protection Pledge

K&N pledges to our customers that they will not be taken advantage of and charged for a repair due to a dealership warranty denial blamed on the presence of a K&N product.

K&N Filters has been designing and manufacturing performance air filters since 1969. We have designed and manufactured over 2400 high flow air filters to fit most of the latest passenger vehicles and over 500 performance air intakes for automotive and motorcycle owners interested in increasing vehicle horsepower and acceleration. K&N also makes thousands of racing and specialty type air filters and we are the #1 Filter in NASCAR®.

K&N replacement filters for motorcycle & ATV offer a lifetime of performance for Harley-Davidson® motorcycles, sports bikes, off-road vehicles, watercraft, snowmobiles and go karts. K&N heavy duty diesel air filters offer excellent filtration and engine protection for class 4-8 trucks, diesel equipment, motorhomes, recreational vehicles, buses, fire trucks, transport vehicles, refrigeration equipment, generators and big rigs. K&N small engine & light industrial air filters are designed to improve the performance of tractors, outdoor power equipment and other small engine applications. K&N also offers a variety of racing air filters, boat, watercraft and other marine flame arrestors, universal clamp on air filters and crank case vent filters for performance and engine protection. Many universal air filter sizes and shapes are available to fit your needs. A K&N car air filter replaces the stock paper filter and provides performance and engine protection.

You've heard the hype about K&N reusable replacement filters, now it's time for you to see what real customers had to say about their experience with our products. These air filter reviews clearly demonstrate why K&N is world famous for quality.

K&N Filter Review - 33-2129

"I dropped this replacment air filter in and noticed an improvement in fuel economy and throttle response from day one. Even though the truck is a V-6 it now gets about 4 mpg better on the highway and 2-3 city. The throttle response is pretty noticeable as well, can't wait to put a trailer behind it again. Highly recommend this filter."

Timothy Donihue
Las Cruces, New Mexico

K&N Air Filter Review - 33-2135

"The product arrived quickly and, as usual for K&N, is of very good quality. I can already tell a difference in the performance of my truck."

Tony Aguiar
Oxnard, California

K&N Filter Review - 33-2281

"Bought this after I realized the dealer lied about changing the air filter. My fuel mileage doubled and my pickup has much more pickup; had to throw sandbags in the back to maintain traction. I've always bought K&N because I love spinning tires, but if you like fuel mileage, these things help immensely."

Nicholas Schitea
Federal Way, Washington

K&N Filter Review - 33-2865

"Super easy drop in replacement, put the K&N Sticker on the Air Box. Now my son doesn't need to worry about ever needing a replacement air filter or dealing with the oil change place when it comes to the air filter. Shipping time wasn't bad coming across the country. Your typical high quality K&N replacement filter, fit perfectly, oiled and ready to go. Highly satisfied with K&N Filters, have 1 in each of our 4 vehicles, first thing that gets replaced when we purchase a car (new or used)."

Roy Greier
North Jackson, Ohio

K&N Filter Review - 33-2304

"I have been a K&N user for many years. In 1986 I purchased my first K&N for my 86 Ford F250 Diesel, then my 2007 Honda Ridgeline, 2012 Subaru Outback and most recently our 2017 Subaru Outback. I have OUTSTANDING service from all my K&N products."

Byron Muck
Marysville, Washington

K&N Filter Review - 33-2364

"Kinda hard to say much as there is no other choice. It is the best product out there. You can feel the increase in torque, never have to replace it and only have to clean it once every two years. Been using a K&N since 1995. My last Jeep had one for 283,000 miles."

Kurt Kolseth
Hawthorn Woods, Illinois

K&N Filter Review - 33-2480

"I have been using K&N filters since I had my first brand new car in 1996 and now I’m on my 8th car, still w/ K&N filters. I have no complains so far because of the savings I got and the additional power the filters gave my cars. I had several Hondas, a Civic & 3 generations of CRV’s, Subaru XV & Outback, My present cars are a Ford Everest and a Mazda CX-5. My modified 1972 VW beetle also has a K&N filter."

Edgardo Espiritu
Davao City, Philippines

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