This is a A-606T123A Muffler PN: 606T123AMain Description As Following : A-606T123A Muffler P.N: 606T123A Vertical / Round Body - 9" Shell Diameter. Muffler Has Double Inlet TubesDim A (1): A: 3 1/2" INLET LENGTHDim B (2): B: 2 1/2" INLET I.D.Dim C (3): C: 36" SHELL LENGTHDim D (4): D: 5" OUTLET LENGTHDim E (5): E: 3 7/8" OUTLET O.D.Dim F (6): F: 43" OVERALL LENGTH Replaces: 86135M NELSON GLOBAL PRODUCTS , Crossed From: VT-1 STANLEY MUFFLER Found in Section & Models : Mufflers/Exhaust Pipes > Mufflers, Versatile TRACTOR: 118 (W/ 6 & 8 CYLINDER DIESEL ENGINES), Versatile TRACTOR: 145 (W/ 6 & 8 CYLINDER DIESEL ENGINES) Associated Items : A-CL212, A-RC9 Also This is An Aftermarket Product And : Vertical / Round Body - 9" Shell Diameter. Muffler Has Double Inlet Tubes Dim A (1): A: 3 1/2" INLET LENGTH Dim B (2): B: 2 1/2" INLET I.D. Dim C (3): C: 36" SHELL LENGTH Dim D (4): D: 5" OUTLET LENGTH Dim E (5): E: 3 7/8" OUTLET O.D. Dim F (6): F: 43" OVERALL LENGTH