The Kubota RP42179440 is a genuine OEM piston ring designed for a wide range of Kubota diesel engines, including D1105, D1005, D905, D722, D662, D902, V1505, V1305, V1205, V1105, V1005, V800, V722, V610, V400, Z602, Z482, Z402, Z600, Z500, Z430, Z300, Z250, Z200, Z180, Z160, Z140, Z130, Z120, Z100, Z80, Z70, Z60, Z50, Z40, Z30, Z20, Z10 models. This essential engine component ensures proper compression and oil control for optimal engine performance and longevity.