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Home > K&N > K&N Diesel Air Filter
KN air filter
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K&N Diesel Air Filter

Whether it's sitting down in your favorite chair, lying down in bed after a long day's work, or finally getting your project car running oh-so-smoothly, that feeling of just right brings peace and satisfaction. It can be hard, sometimes, to find an air filter for your vehicle that's just right when your air filter needs are outside the norm. It can seem like an insurmountable task if you have space limitations under the hood, performance goals you don't want to inhibit, aesthetics you don't want to compromise or stringent standards of engine protection. Thankfully, your just right woes are over. K&N has a ton of performance air filter sizes that will deliver superior airflow, and superior performance.

K&N air filters were born in the dirt. In 1969, Ken Johnson and Norm McDonald were tired of disposable air filters for their off-road motorcycles constantly getting plugged up. Thus, they embarked on a journey to develop a washable, reusable air filter that would help their motorcycles perform better. Over the last 45+ years, Ken and Norm's design has been refined and proven to be a simple performance add-on that helps to minimize restriction, increase performance, and provide excellent air filtration efficiency.

At the core of a K&N air filter is its premium oiled cotton gauze air filter media. 4-6 layers of cotton are layered, slightly offset from one another, pleated between wire mesh for rigidity, and impregnated with K&N's air filter oil. Cotton breathes better than paper and the oil acts as a tacking agent, turning cotton strands into microscopic dirt-catching fingers. Other air filter manufacturers may use cotton, some use oil, and most use a pleated design. But K&N brought these design elements together in a way that has made it a leader in aftermarket performance air filters.

K&N Diesel Truck Air Filters
- Dodge Cummins
- Ford Powerstroke
- GM Duramax

Thoroughbred Diesel is an experienced diesel company that specializes in KN performance air filters. KN is widely known for the world's best air filter. For more than 30 years, KN Filters have been the choice in engine filtration. The KN filter delivers virtually unrestricted flow letting your engine run stronger, cleaner and with greater fuel efficiency.

The secret of the KN filter is its filter medium. Four to six sheets of pleated and oiled cotton-gauze are layered between two sheets of aluminum wire mesh. This proven design stops dirt, dust and other harmful particles like no other filter, all while clean, power-enhancing air flows freely to your engine.

Just give it a simple cleaning every 50,000 miles and your KN filter will last for the life of your vehicle. With no costly changes and services, your KN filter will save you money. And, you’ll be helping the environment by reducing the number of disposable air filters that end up in landfills.

Get increased power and acceleration, better fuel economy from a filter that lasts for 1,000,000 miles–get a KN.

KN air filter styles KN air filter
Selling Points for the KN Air Filter
  • High Air Flow with Excellent Filtration
  • Designed to Increase Horsepower and Acceleration
  • Washable and Reusable
  • Will NOT Void Vehicle Warranty
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • KN Million Mile Limited Warranty®
  • Emissions Legal in all 50 US States.
  • Economical, a KN Air Filter Will Last the Life of Your Automobile, Motorcycle, or ATV
  • Works with Original Equipment Manufacturer Vehicle Electronics
  • Environmentally Friendly, KN Reusable Air Filters Reduce the Volume of Disposable Air Filters that end up in the Nation's Landfills
The Last Air Filter Your Engine Will Ever Need - We warranty our automotive and street vehicle replacement filters for 1 million miles. Why would we do such a thing? Because they are engineered to last the life of your auto and motorcycle engine. We use only the highest quality materials and never compromise. Every 50,000 miles, we recommend you clean and re-oil our filter, then put it back in your engine and it will perform virtually like new.

KN Filter Information

Get better fuel economy The U.S. Government recommends replacing your car's dirty air filter for an improvement in fuel mileage of up to 10%.

KN Lifetime air filters feature High-Flow Technology to help your car breathe easier, giving you the power you crave while following these government fuel saving guidelines - and because KN is a Lifetime filter, it never needs to be replaced.

An engine that is getting the optimal amount of air flow is an efficient engine, and one that will show improvements in fuel mileage over an engine that is gasping for breath through a clogged air filter.

With fuel prices at record highs, isn't it nice to know that something as simple and inexpensive as changing your car's dirty air filter can improve mileage? Other mileage savings tips include making sure that your car's tires are properly inflated and removing unused accessory racks and heavy items from the car when not in use.

Add Horse Power KN Lifetime air filters feature High-Flow Technology to help your car breathe easier, giving you the power you crave without the reliability headache often associated with high performance parts - and because KN is a Lifetime filter, it never needs to be replaced.

Your car's engine is essentially a giant air pump, combusting a mixture of fuel and air with a carefully timed spark. The more air the engine has available, the more horsepower it can make.

An engine that breathes more easily will also show improvements in throttle response. Throttle response is measured by the amount of delay or hesitation that your car exhibits between when you press down on the gas pedal and when the engine responds by delivering power. Improvements in throttle response give you more "pep" in your car's acceleration.

Never needs replacing KN Lifetime air filters feature High-Flow Technology to help your car breathe easier, giving you the power you crave without breaking the bank - and because KN is a Lifetime filter, it never needs to be replaced. The money you save not having to change disposable paper filters is working for you to buy horsepower.

Stop throwing away money with disposable air filters. KN Lifetime filters cost more initially, but never have to be replaced for the life of your car. This will save money in the long run compared to the cost of buying disposable replacement air filters.

If you are paying for labor by having your air filter serviced every 15,000 miles (as is often the case on many new cars) the savings are even greater. Now, not only are you saving on the cost of buying replacement disposable filters, you are also saving on the labor to have your old filter removed and the new one installed. Do the math. This is a significant savings over the life of you car and money that can better be put to use getting out on the road and enjoying life.

Environmentally Friendly Over 100 million disposable paper air filters end up in US landfills or incinerators every year.

KN Lifetime air filters never need to be replaced. KN Lifetime filters feature High-Flow Technology to help your car breathe easier, giving you the power you crave while reducing waste.

KN Lifetime Air Filters are made of cotton, a renewable resource (unlike the trees from which paper is made that take years to grow to maturity).

A clean air filter can also improve fuel mileage by up to 10%* over a clogged air filter. That 10% of fuel that is saved also helps to reduce vehicle emissions related pollution.

These days, the most common style of air filter is a flat panel type. K&N performance replacement panel air filters are designed to be installed in a factory style air box. They have a durable urethane sealing lip that gets compressed between the top and bottom of the air box, providing an airtight seal. If you want to retain the factory look under the hood but don't want to compromise performance with a disposable paper air filter, find a K&N flat panel air filter for your vehicle.

Round air filters are another popular style of performance air filter. Most times, these air filters are fit between a lid and bottom tray on top of a carburetor or similarly-styled throttle body. Especially hot rodders and classic car lovers should look to K&N for many air filter sizes to meet their needs. Available in many diameters and heights, from short and wide to tall and skinny, K&N has a round air filter for you.

K&N round straight clamp-on air filters have applications and air filter sizes as varied as colors in a home improvement store paint aisle. These air filters are designed to be secured to an intake tube, or carburetor inlet, using a hose clamp. K&N universal air filters are quite popular with modern fuel-injected or forced-induction applications due to the variety of air filter sizes. The flange of these filters can be stretched up to 1/16" (1.5mm) to fit in-between sizes.

Round tapered clamp-on air filters are just like their round straight clamp-on cousins, except that they taper in diameter along their length from the base to the end cap. This adds a sleek visual appeal and allows many air filter sizes to fit in smaller spaces where a round straight clamp-on may not fit. Many round straight and round tapered clamp-on filters are also available in air filter sizes with chrome end caps for sharper styling.

K&N oiled cotton performance replacement and universal air filters are washable and reusable. Depending on driving conditions, and air filter sizes, remove the filter from the vehicle from time-to-time and service it using a K&N Recharger Kit with it's easy-to-follow step-by-step instructions. Whether your vehicle travels over-the-road or off-road, a K&N air filter can help it perform better by allowing your engine to breathe easier. K&N backs its air filters with excellent warranties that match their excellent design. Air filters for passenger vehicles and factory over-the-road applications are backed by a 10-year/million mile limited warranty, and those for universal, off-road or custom applications are warranted against defective materials or workmanship for one year from date of purchase with no mileage limitation.

kn authorized dealer Shop with confidence! Thoroughbred Diesel is a authorized K&N dealer. We stock a full line of K&N products with prompt shipping. Call us at 866-737-4966.
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K&N Air Filters
Fits: Jeep Wrangler JK 2.8L diesel models
Years: 2007-2015
K&N Part # 33-5023
Our Part # KAN33-5023
2009-2012 Volkswagen 2.0L TDI Air Filters 2009-2012 Volkswagen 2.0L TDI Air Filters
1997-2006 Volkswagen 1.9L TDI Air Filters 1997-2006 Volkswagen 1.9L TDI Air Filters
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K&N Cleaning Kit:
Part # 99-5000
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4843 Rockwell rd.
Winchester, KY 40391
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