The Donaldson P551433 and Mann-Filter WK814/8 are high-quality spin-on fuel filters designed for efficient fuel filtration and water separation. Featuring an M16x1.5 thread, an outer diameter of 80 mm, and a height of 102 mm, these filters ensure clean fuel delivery to the engine. They are commonly used in a wide range of agricultural and construction equipment from brands like Caterpillar, John Deere, Perkins, AGCO, Claas, Fendt, Massey Ferguson, and Valtra, providing reliable protection against contaminants. These filters are direct equivalents to OEM part numbers such as Caterpillar 1R0749 and John Deere RE509031.