One New Aftermarket Replacement Exhaust Muffler Pipe That Fits John Deere Tractor Models: 70 (1953-1955), 720 (1956-1958), 730 (1958-1959) 70, 720, 730 Uses with F30305R Manifold. Uses with R21826R, AR20450, and AA2214R Mufflers Dimensions: 2 Bolt Inlet 13″ Vertical Length 25″ Horizontal Length 2 1/2″ Outlet Outside Diameter Replaces Part Number: AR20516R, AR20516, AF1520R Models This Part Fits: 720, 730 Reference Numbers: AF1520R, AR20516, AR20516R, AR20516R-A