John Deere Original Equipment Piston Ring Kit (Pack of 2) - AM128738 This contains TWO (2) AM128738 piston ring kits. Piston Ring Set Fits the following John Deere models: 345, 325, 335, 647, 647A, 657, 657A, 667, 667A, 717, 717A, 727, 727A, 737, 757, GT245, GX255, GX335, X320, X324, X340, X360, X465, X500, X530, X534, Z445, Z465, Z810A, Z820A.