This is a A-AH87289 Muffler PN: AH87289Main Description As Following : A-AH87289 Muffler P.N: AH87289 Horizontal / Round Body - 7" Shell Diameter. Naturally AspiratedDim A (1): A: 4" INLET LENGTHDim B (2): B: 2 3/4" INLET I.D.Dim C (3): C: 20" SHELL LENGTHDim D (4): D: 2 1/2" OUTLET LENGTHDim E (5): E: 2 1/2" OUTLET O.D.Dim F (6): F: 23" OVERALL LENGTH Crossed From: AV103820 VAPORMATIC , DR-108 STANLEY MUFFLER , 1417-3903 , Found in Section & Models : Mufflers/Exhaust Pipes > Mufflers, John Deere COMBINE: 3300, John Deere COMBINE: 4400, John Deere COMBINE: 4420, John Deere COMBINE: 6600, John Deere COMBINE: 6620, John Deere COMBINE: 7700, John Deere COMBINE: 955 (Combines w/Straw Collector) Associated Items : A-CL134 Also A-JD-O-OMH111330, A-JD-O-OMH120048 And : Horizontal / Round Body - 7" Shell Diameter. Naturally Aspirated Dim A (1): A: 4" INLET LENGTH Dim B (2): B: 2 3/4" INLET I.D. Dim C (3): C: 20" SHELL LENGTH Dim D (4): D: 2 1/2" OUTLET LENGTH Dim E (5): E: 2 1/2" OUTLET O.D. Dim F (6): F: 23" OVERALL LENGTH