This is a A-184207M91 Muffler PN: 184207M91Main Description As Following : A-184207M91 Muffler P.N: 184207M91 Horizontal / Round Body - 3 1/4" Shell DiameterDim A (1): A: 2" INLET LENGTHDim B (2): B: 1 15/16" INLET I.D.Dim C (3): C: 13 1/2" SHELL LENGTHDim D (4): D: 2 1/2" OUTLET LENGTHDim E (5): E: 1 3/8" OUTLET O.D.Dim F (6): F: 18" OVERALL LENGTH Crossed From: MF-12 STANLEY MUFFLER , 1217-2303 , Found in Section & Models : Mufflers/Exhaust Pipes > Mufflers, Massey Ferguson INDUSTRIAL/CONSTRUCTION: 302 (W/ GAS ENGINE), Massey Ferguson INDUSTRIAL/CONSTRUCTION: 304 (W/ GAS ENGINE), Massey Ferguson TRACTOR: 50 (W/ GAS ENGINE), Massey Ferguson TRACTOR: 65 (W/ GAS ENGINE) Associated Items : A-CL112, A-CL200 Also A-MH-O-MF302304, A-MH-P-MF302304, A-MH-S-MF302304, A-MH-O-MF302304, A-MH-P-MF302304, A-MH-S-MF302304, A-FRM-MH, A-MH-O-MF5065, A-MH-P-MF50, A-MH-P-MF50IND, A-MH-S-MF100LDR, A-MH-S-MF3550, A-SMMF14, 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 And : Horizontal / Round Body - 3 1/4" Shell Diameter Dim A (1): A: 2" INLET LENGTH Dim B (2): B: 1 15/16" INLET I.D. Dim C (3): C: 13 1/2" SHELL LENGTH Dim D (4): D: 2 1/2" OUTLET LENGTH Dim E (5): E: 1 3/8" OUTLET O.D. Dim F (6): F: 18" OVERALL LENGTH