One new aftermarket replacement muffler fits Massey Ferguson tractor models: 230, 235, 245, 255, 265, 275 with Perkins Gas and Diesel 4-236 or 4-248 engines. Vertical/Oval Body – 4″ X 8″ Shell Dimensions (Muffler has straight outlet pipe) Dimension A(1) A: 2 3/4″ Inlet Length Dimension B(2) B: 2 1/8″ Inlet Inside Diameter Dimension C(3) C: 23″ Shell Length Dimension D(4) D: 8 1/2″ Outlet Length Dimension E(5) E: 2″ Outlet Outside Diameter Dimension F(6) F: 34″ Overall Length Replaces Part Numbers: 578090M92, 578090M1 Models This part fits: 230, 235, 245, 255, 265, 275 Reference Numbers: 1217-5406, 1217-5406-A, 578090M1, 578090M92, 578090M92-A