One New Aftermarket Replacement Vertical Oval Muffler that fits Allis-Chalmers Tractor Model: D17 (WITH GASOLINE ENGINE – SN 42001) Industrial Construction Model: 707 Body Dimensions: 4 1/2″ X 9″ Dimension A(1) A: 4 3/4″ INLET LENGTH Dimension B(2) B: 1 15/16″ INLET DIAMETER OUTLET Dimension C(3) C: 16 1/4″ SHELL LENGTH Dimension D(4) D: 8″ OUTLET LENGTH Dimension E(5) E: 2″ OUTLET DIAMETER OUTLET Dimension F(6) F: 29″ OVERALL LENGTH Replaces Part Numbers: 70246129, 246129 Models This Part Fits for: 707, D17, D17 (petrol) Reference numbers: 246129, 70246129, 70246129-A, A-70246129, A-70246129-A