The Kubota W21CKT4604 is a genuine OEM air filter designed to provide superior filtration for a wide range of Kubota engines and equipment. This high-quality filter effectively captures dust, dirt, and other airborne contaminants, protecting your engine from wear and tear and ensuring optimal performance and longevity. It is a direct replacement for several Kubota models including B-Series, BX-Series, L-Series, M-Series, MX-Series tractors, RTV utility vehicles, and ZD-Series zero-turn mowers.