Genuine OEM Mitsubishi MM434813 piston ring set, essential for maintaining optimal engine compression and oil control. This high-quality ring set is specifically designed for various VST Fieldtrac tractor models, including 918, 918D, 920, 920D, 922, 922D, 924, 924D, 925, 925D, 926, 926D, 927, 927D, 928, 928D, 929, 929D, 930, 930D, 932, 932D, 933, 933D, 934, 934D, 935, 935D, 936, 936D, 937, 937D, 938, 938D, 939, 939D, 940, 940D, 941, 941D, 942, 942D, 943, 943D, 944, 944D, 945, 945D, 946, 946D, 947, 947D, 948, 948D, 949, 949D, 950, 950D, 951, 951D, 952, 952D, 953, 953D, 954, 954D, 955, 955D, 956, 956D, 957, 957D, 958, 958D, 959, 959D, 960, 960D, 961, 961D, 962, 962D, 963, 963D, 964, 964D, 965, 965D, 966, 966D, 967, 967D, 968, 968D, 969, 969D, 970, 970D, 971, 971D, 972, 972D, 973, 973D, 974, 974D, 975, 975D, 976, 976D, 977, 977D, 978, 978D, 979, 979D, 980, 980D, 981, 981D, 982, 982D, 983, 983D, 984, 984D, 985, 985D, 986, 986D, 987, 987D, 988, 988D, 989, 989D, 990, 990D, 991, 991D, 992, 992D, 993, 993D, 994, 994D, 995, 995D, 996, 996D, 997, 997D, 998, 998D, 999, and 999D. Replace worn piston rings to restore engine efficiency, reduce oil consumption, and ensure reliable operation.