This is a A-AR63272HC Piston Liner Kit, 6.404T/A (High Compression) PN: AR63272HCMain Description As Following : A-AR63272HC Piston Liner Kit, 6.404T/A (High Compression) PN: AR63272HC Found in Section & Models : Engine Parts > 6.404T/A Diesel, 400 Series, John Deere COMBINE: 6600 (SN 335845>, 6.404T/A, 6 CYL ENG), John Deere COMBINE: 7700 (SN 335845>, 6.404T/A, 6 CYL ENG), John Deere EXCAVATOR: 690B (SN 335845>, 6.404T/A, 6 CYL ENG), John Deere FORAGE HARVESTER: 5440 (SN 335845>, 6.404T/A, 6 CYL ENG), John Deere INDUSTRIAL/CONSTRUCTION: 693C (SN 335845>, 6.404T/A, 6 CYL ENG), John Deere TRACTOR: 4320 (SN 335845>, 6.404T/A, 6 CYL ENG), John Deere TRACTOR: 4430 (SN 335845>, 6.404T/A, 6 CYL ENG), John Deere TRACTOR: 4630 (SN 335845>, 6.404T/A, 6 CYL ENG), John Deere WHEELED FELLER BUNCHER: 740 (SN 335845>, 6.404T/A, 6 CYL ENG) Associated Items : New Also A-SMJD203, A-FRM-JD, A-JD-O-OMR65532, A-JD-P-PC1295, A-JD-S-TM1057, A-JD-S-TM1172, A-SMJD50, A-FRM-JD, A-JD-O-OMR65495, A-JD-P-PC1296, A-JD-S-TM1172, A-SMJD50 And : High Compression Piston Bore: 4.250" (108MM) Pin Diameter: 1.610" (41MM) Type: High Compression Hypereutetctic Alumium Alloy Piston