... engine piston 1) OEM: 6140-31-2113 2) for Komatsu excavator 4D92 3) good quality with reasonable price Product Information1) we have engine ... following: Komatsu excavator engine, Mitsubishi engine, Suzuki engine, CAT excavator engine, Yammner engine, Perkins engine, Hino engine, Nissan engine, Daewoo engine ...........2) engine types: 4D92, ... after-service Komatsu excavator engine piston 6140-31-2113