AR21805R New Vertical Oval Body 19" Muffler Fits John Deere Tractor 80 820 830 +One New Aftermarket Replacement Muffler that Fits John Deere Tractor models: 80, 820, 830 Vertical oval body. Shell 9 1 2" x 5 1 2" Dim A (1) A: 2 1 2" INLET LENGTH Dim B (2) B: 3 3 8" INLET I. D. Dim C (3) C: 14 1 4" SHELL LENGTH Dim D (4) D: 2 3 4" OUTLET LENGTH Dim E (5) E: 3 1 2" OUTLET O. D. Dim F (6) F: 19" OVERALL LENGTH Replaces Part Numbers: AR21805R, DR 17 RA