K&N Industrial Air Filter for Onan QD 8000, QD 7500 and QD 6000 Generators

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K&N makes replacement air filters for just about anything, even many industrial equipment engines. K&N part number E-4551 is a replacement industrial air filter for Onan QD 8000, Onan QD 7500 and Onan QD 6000 generators.
Replacement Industrial Air Filter for ONAN QD Equipment
Replacement Industrial Air Filter for ONAN QD Equipment

The E-4551 is one of the K&N replacement filters in our new line of industrial replacement air filters. This filter uses the new K&N hybrid filtration medium which is very strong and incredibly easy to clean. The new hybrid media does not require any oil and is robust enough to be cleaned using power sprayers, pressure washers or standard truck washing equipment. Instead of repeatedly throwing away expensive disposable air filters, now you have a choice! This washable air filter is designed to improve the generator's performance and make filter maintenance a snap. Using a K&N reusable industrial air filter can help reduce waste and the cost of buying disposable filters over and over.

The E-4551 has a height of 4 inches with an outside length and width of 6.75 inches X 4.063 inches and fits Onan QD generator engines that use Onan OEM number 1402897, see the list of engine types below.

ONAN OEM air filter number 1402897
ONAN QD 8000 - HDKAK - Spec Letter A-H, OE#140-2897
ONAN QD 7500 - HDKAJ - Spec Letter A-H, OE#140-2897
ONAN QD 6000 - HDKAH - Spec Letter A-H, OE#140-2897

To find the right K&N products for your replacement air filter needs use the application search on You will also find many small engine and light industrial air and oil filters on K&N's Industrial Air & Oil Filter page or if you know the OE part number use our cross reference search. Use the K&N dealer search to find a K&N dealer near you.

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K&N Engineering in Riverside California is the world's leading manufacturer of washable performance air filters and air intake systems. K&N invented the reusable high flow cotton air filter in 1969 and has been perfecting the technology ever since. K&N is a world class filtration company selling air filters, oil filters, and intakes in over 30 countries. K&N sells over 5,000 products designed for cars, trucks, motorcycles, engines, and industrial applications. From their Million Mile Warranty to their Consumer Protection Pledge, K&N stands behind their products and their consumers 100%. The distinctive K&N logo represents performance from one of the original performance companies. For more information, visit