This 2 pack of K&N oil filters, model KN-145, is designed to fit Yamaha and Aprilia motorcycles. With OE/OEM part numbers including 4X7134400000, 4X71344001, 2H0134409000, 4X7134400100, 5JX134400000, 4X7134409000, and 583134401000, these filters are compatible with a wide range of models. The K&N brand is known for producing high-quality filters that help to improve engine performance and prolong the life of the engine. This pack of oil filters is an excellent choice for motorcycle enthusiasts who want to keep their engines running smoothly without worrying about the condition of their filters.