This is a A-G45728 Muffler PN: G45728Main Description As Following : A-G45728 Muffler P.N: G45728 Horizontal / Round Body - 4 1/4" Shell DiameterDim A (1): A: 2 3/4" INLET LENGTHDim B (2): B: 1 7/8" INLET I.D.Dim C (3): C: 13 1/2" SHELL LENGTHDim D (4): D: 2 3/4" OUTLET LENGTHDim E (5): E: 2" OUTLET O.D.Dim F (6): F: 19" OVERALL LENGTH Crossed From: CA-9 STANLEY MUFFLER Found in Section & Models : Mufflers/Exhaust Pipes > Mufflers, Case-IH TRACTOR: 600B (1957-1958), Case-IH TRACTOR: 610B, Case-IH TRACTOR: 611B (1957-1958) Associated Items : A-CL178, A-CL200 Also A-CA-O-500B, A-CA-P-500B600B, A-CA-S-350, A-SMC201, A-CA-O-500B, A-CA-P-500B600B, A-CA-S-350, A-CA-O-500B, A-CA-P-500B600B, A-CA-S-350 And : Horizontal / Round Body - 4 1/4" Shell Diameter Dim A (1): A: 2 3/4" INLET LENGTH Dim B (2): B: 1 7/8" INLET I.D. Dim C (3): C: 13 1/2" SHELL LENGTH Dim D (4): D: 2 3/4" OUTLET LENGTH Dim E (5): E: 2" OUTLET O.D. Dim F (6): F: 19" OVERALL LENGTH