K&N Replacement Air Filters

  • Designed to Increase Horsepower
  • Easy to Install Drop-in Design
  • Lifetime Reusable Air Filter
  • Million Mile Limited Warranty®
  • Lasts up to 50,000 Miles Between Servicing
  • Air Filter Reviews

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

Why Get a K&N Air Filter?

A K&N replacement air 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 air filters are easy to install and come with the worry-free K&N Million Mile Limited Warranty®.

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

K&N Air Filters are Designed to Increase Horsepower

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 air 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 Air Filters are Easy to Install
K&N air filters are easy to install because of their simple drop-in design.

K&N Air Filters are Easy to Install

K&N replacement air 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 air filters are reusable and designed to be the last air filter your vehicle will ever need.

Lifetime Reusable Air Filters

K&N replacement air filters last up to 50,000 miles between servicing, depending on driving conditions. With the K&N Air 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 air 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 Million Mile Limited Warranty®

K&N air 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.

Air Filter Filtration & Engine Protection

K&N air 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 air filters with the most possible airflow while providing guaranteed engine protection.

Carl and his million mile truck with one K&N air filter installedCarl Judice drove more than one million miles with a single K&N air filter installed in his Chevy truck.

K&N Air Filter Testing

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 air 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.

Air Filter Fuel Economy

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 air filter products for yourself.

K&N Air Filter Oil

A K&N air 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 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.

K&N Consumer 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 air 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 Air Filter History

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®.

Other K&N Performance Air Filter Products

K&N replacement air 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.

K&N Air Filter 33-2129

K&N Replacement Air Filter Review - 33-2129

"I could tell an immediate difference after replacing the stock air filter in my 2011 GMC Sierra with the K&N filter. Engine performance increased dramatically. I am very pleased."

James Davis
Clayton, North Carolina
K&N Air Filter 33-2135

K&N Replacement Air Filter Review - 33-2135

"Ordering on-line was easy and product arrived earlier than expected. Thank You"

Jan Pedersen
K&N Air Filter 33-2281

K&N Replacement Air Filter Review - 33-2281

"I've bought several K & N filters, for my Toyota's, and they are a perfect fit, easy to install and gas mileage is up just a bit. The new stickers wirh warnings for service shops that are not familiar wirh K & N was appreciated."

Toledo, Oregon
K&N Air Filter 33-2865

K&N Replacement Air Filter Review - 33-2865

"FIVE STARS K&N makes exceptional filters that fit perfectly and provide the best over the counter performance for minimal investment. My mileage remains at 48-50MPG on my TDI with improved acceleration using the K&N filter. Highly recommended. Since you have to replace your filter anyway, why not go with the best Bonus that its washable and will not need replacing for probably the life of the vehicle. Don't waste your money on other cheaper filters, K&N is worth the investment."

Jetta TDI Owner
Janesville, Wisconsin
K&N Air Filter 33-2304

K&N Replacement Air Filter Review - 33-2304

"I've only had the K&N filter in my Subaru Outback for a few weeks, but I noticed an immediate increase in power. The exhaust even sounds a little throatier. Website was a breeze and delivery was very quick. Thanks."

Randy Riddle
North Carolina
K&N Air Filter 33-2364

K&N Replacement Air Filter Review - 33-2364

"Had one of these air filters on my 1998 Dodge 4WD Turbo Diesel and had 340,000 miles on the air filter. Gave my truck to my daughter because it stills runs great and should get another 150,000 miles before any engine work needs to be done."

David Lopez
Pagosa Springs, Colorado
K&N Air Filter 33-2480

K&N Replacement Air Filter Review - 33-2480

"I live in the UAE, and ordered this fillter for my Mazda 3 2014 2.0L Skyactive.The K&N filtter perfectly fits.I placed the order on 25/11 and recived on 28/11; what amazing delivery service through FEDEX. Thanks alot pro; good business idea. Ssimply get rid off genuine rubish mazda engine filter"

Jamal Badhafari
Abu Dhabi, UAE
K&N 33 Series Automotive FiltersK&N 33 Series Panel Automotive Filters
A K&N 33 series OE replacement air filter is designed to increase horsepower and acceleration. These washable and reusable panel air filters are easy to install because they fit directly into the existing vehicle factory air box.
K&N AC, AL, and AT Series Air FilterK&N AC, AL, and AT Series Air Filters
K&N AC Series performance air filters are designed for Arctic Cat ATVs. The K&N AL Series air filter is developed for the Aprilia motorcycle. K&N AT Series filters are designed for ATK motorcycles. K&N washable and reusable AC, AL and AT Series air filters are application specific and fit right into the OEM air box.
K&N B Series Performance Air FilterK&N BA, BD, BM & BU Series Air Filters for Bajaj Pulsar, BMW and Buell Motorcycle
K&N makes the BA, BD, BM and BU Series reusable air filters for Baja Pulsar, BMW and Buell motorcycles. They are designed to improve horsepower and torque and easily replace your bike's stock air filter element.
K&N Ducati Motorcycle Replacement Air FilterK&N DU Series Ducati Motorcycle Air Filters
A K&N Ducati motorcycle drop-in air filter is washable, reusable and easy to install. K&N's DU Series filters are designed to add performance and power while protecting your engine.
K&N Round Automotive Air FilterK&N E Series Round Automotive Air Filters
K&N E Series round automotive air filters are designed to replace your restricted factory air filter for additional horsepower and performance. These K & N air filters are washable, reusable and last up to 50,000 miles before cleaning is required, depending on your driving conditions.
K&N Honda Motorcycle Washable Air FilterK&N HA Series Honda Motorcycle Air Filters
Washable and reusable HA Series air filters from K&N are application specific and fit directly into the OEM air box of your Honda motorcycle. A K&N performance air filter is a simple way to add performance to your bike.
K&N Harley Davidson® Motorcycle Air FilterK&N HD Series Harley Davidson® Motorcycle Air Filters
K&N manufactures the HD Series air filter for Harley Davidson® motorcycles. These reusable filters are designed to add horsepower and torque while at the same time providing excellent filtration and engine protection.
K&N Kawasaki Motorcycle Cotton Air FilterK&N KA Series Kawasaki Motorcycle Air Filters
The KA Series replacement air filter from K&N is designed to improve the performance of Kawasaki motorcycles. These cotton air filters are pleated to provide a large filtration area and long service intervals.
K&N Suzuki Motorcycle Replacement Air FilterK&N SU Series Suzuki Motorcycle Air Filters
K&N's high-flow filters for Suzuki motorcycles offer virtually unrestricted air-flow to keep your engine breathing strong. The K&N SU Series air filter is reusable and easy to install.
K&N Yamaha Motorcycle Performance Air FilterK&N YA Series Yamaha Motorcycle and ATV Air Filters
K&N YA Series performance filters are designed to increase horsepower and torque for Yamaha motorcycles while offering excellent filtration. The K&N OE replacement air filter is easy to install and can be used over and over again.