... piston 1) OEM: 6140-31-2113 2) for Komatsu excavator 4D92 3) good quality with reasonable price Product Information1) we ... pistons for sale, like the following: Komatsu excavator engine, Mitsubishi engine, Suzuki engine, CAT excavator engine, Yammner engine, Perkins engine, Hino engine ... quality, good packing, fast delivery and good after-service Komatsu excavator engine piston 6140-31-2113