Big Rig, Semi-Truck & Diesel Bus K&N Air Filter Delivers Lower Maintenance Costs

The 38-2003R K&N air filter itself is approximately 24 inches high, with a top outside diameter of 10 inches, a bottom outside diameter of 13-1/2 inches, and a 7 inch flange

For decades K&N has been building air filters designed for performance, durability and longevity. K&N air filters have become world renowned for their superior quality and exceptional airflow for increased power. K&N offers a replacement air filter for most cars, trucks, motorcycles, and ATVs, however it wasn’t until recently that K&N began to offer Heavy Duty (HD) Replacement Air Filters for Big Rig, Semi Truck & Bus applications. K&N commercial grade diesel air filters are built tough to withstand commercial use and are backed by a three year/300,000-mile limited warranty.

K&N heavy duty diesel replacement air filter 38-2003R is a reverse flow air filter housed inside a reusable metal canister

K&N HD diesel air filters are built using a “hybrid” synthetic air filter filtration material. This material utilizes filtration techniques employed by both K&N cotton and non-woven synthetic air filters in order to provide exceptional filtration, superior airflow, and superior performance. Unlike conventional K&N reusable filters, a HD reusable air filter does not need air filter oil. This makes them fast and easy to clean. Fast cleaning, and long service intervals coupled with their reusable design makes them a viable way for Big Rig, Semi-Truck & Bus owners or fleets to lower maintenance costs.

The easiest way to find the proper K&N Replacement Heavy Duty Diesel Air Filter for a heavy duty diesel application is by air filter cross reference using the current disposable air filter. While this is a pretty accurate way to find a K&N HD air filter, keep in mind that an air filter cross reference should be for comparison of filters with similar dimensions. This is important because some filters are available in either standard or reverse airflow directions. K&N heavy-duty diesel air filter, number 38-2003R, is a prime example.

K&N Heavy Duty Diesel Air Filters are designed to be reused and when restriction becomes too high, simply wash with K&N degreaser

K&N heavy duty diesel replacement air filter 38-2003R is a reverse flow air filter housed inside a reusable metal canister. The filter itself is approximately 24 inches high, with a top outside diameter of 10 inches, a bottom outside diameter of 13-1/2 inches, and a 7 inch flange. Please call K&N’s customer service department at 1-877-AIR-FILTER for assistance deciding if this is the proper replacement air filter for your application .This air filter serves as an air filter cross reference for the following filters:

Baldwin PA2723
Carquest 88895
Donaldson P537449
Farr 62891003
Fleetguard AH8505
Fram CA7231
Hastings AF2269
Luber-Finer LAF1844
Napa 6895
Racor 062891003
WIX 46895

Additional K&N commercial grade heavy duty air filters and oil filter upgrades can be found on the K&N Washable Heavy Duty Replacement Air Filters page on KNFilters.com. Or use the K&N Filter Cross Reference Search to get an idea of which K&N commercial grade diesel air filter is needed.