The K&N E-4552 is a round, washable replacement element from K&N's industrial line, built for outdoor power equipment and small engines. The manufacturer lists it at 1.875 in inside diameter, 3.5 in outside diameter, and 7.125 in height, with a hybrid non-woven synthetic medium that K&N describes as easy to clean. Rather than tossing a disposable paper element at every service interval, you can pull this one, rinse it, dry it, and reinstall it. That reuse is where the savings add up on a tractor, utility vehicle, or compact loader working in dusty conditions.
K&N states the filter runs dry with no oil required, so a cleaned element goes back in without a re-oiling step, and the spec sheet lists a one-year limited warranty. Fitment is the key check. The manufacturer's site documents use on Onan QD 10000 and 12000 generators and cross-references the element to several OEM numbers from Kubota, John Deere, and Onan. Owner reviews on the manufacturer's site describe fit on Kubota RTV900 and BX-series machines, but other fitment lists vary, so match your engine's OEM number before buying. For a washable K&N E-4552 air filter for a Kubota RTV, John Deere Gator, or Onan QD generator, confirm the dimensions and cross-reference against your existing element first.
The manufacturer says this K&N industrial element is designed for dry use with no oil required. Its cleaning guidance also says the element should dry completely before it goes back into the housing.
The manufacturer documents use on Onan QD 10000 and QD 12000 generators and lists cross-reference numbers for Kubota, John Deere, and Onan. Vehicle fitment lists differ across sources, so confirm with the manufacturer using your OEM part number before ordering.
The manufacturer's specifications list a one-year limited warranty on the E-4552.
Per the manufacturer's cleaning guidance, servicing this element is a simple wash-and-dry routine. You will need a bucket, mild detergent, and clean water. Soak the filter for a few minutes, agitate it gently to loosen dirt, and rinse thoroughly. Let it air-dry naturally, and avoid heat sources such as blow dryers. The manufacturer says no solvents, hot water, or pressure washing are needed. Reinstall the element only after it is completely dry. Installation difficulty and clamp or housing details for this specific part were not confirmed in research, so check your equipment manual before removing the old element.
