OEM: Case/International Harvester - 398511R1, 398511R1GV, IH-19 Model: Case/International Harvester - 706, 756, 856, C263 Eng, C291 Eng, C301 Eng Tech. Data: Inlet I.D. 2-15/16", Outlet O.D. 3", O/A Length 34", Inlet Length 4", Outlet Length 10-1/2", Shell Length 19-1/2".