Description Horizontal muffler, Oval body. Inlet 1-3/4" I.D., Outlet 1-3/4" O.D., 19-1/2" overall length. For 3 cyl diesel engines. Tractors: 3230, 3430, 3930, 4130, 4610, 4000 (1965 to 1974), 4610SU (1982 to 1990). This item is a suitable alternative for the following: C7NN5230H, FO31MFLR, FO31, 87704574