This is a A-186886M91 Muffler PN: 186886M91Main Description As Following : A-186886M91 Muffler P.N: 186886M91 Horizontal / Round Body - 3 1/4" Shell DiameterDim A (1): A: 2 1/4" INLET LENGTHDim B (2): B: 1 3/4" INLET I.D.Dim C (3): C: 23" SHELL LENGTHDim D (4): D: 15 1/2" OUTLET LENGTHDim E (5): E: BENT TUBEDim F (6): F: 40" OVERALL LENGTH Crossed From: AM186886M91 , , MF-1 STANLEY MUFFLER , 1217-2300 , Found in Section & Models : Mufflers/Exhaust Pipes > Mufflers, Massey Ferguson TRACTOR: 65 (W/ DIESEL ENGINE 1958-1964) Associated Items : A-CL134 Also A-FRM-MH, A-MH-O-HYDRSYST, A-MH-O-MF5065, A-MH-O-MF65, A-MH-O-MF65DSL, A-MH-O-MF65LATE, A-MH-P-MF65, A-MH-S-MF100LDR, A-MH-S-MF65, A-SMMF201 And : Horizontal / Round Body - 3 1/4" Shell Diameter Dim A (1): A: 2 1/4" INLET LENGTH Dim B (2): B: 1 3/4" INLET I.D. Dim C (3): C: 23" SHELL LENGTH Dim D (4): D: 15 1/2" OUTLET LENGTH Dim E (5): E: BENT TUBE Dim F (6): F: 40" OVERALL LENGTH