One New Aftermarket Replacement Muffler That Fits Allis Chalmers Tractor Model: 190 Dimensions: Inlet Length (A) 2″ Inlet Inside Diameter (B) 2-3/8″ Shell Length (C) 18″ Outlet Length (D) 2-3/4″ Outlet Outside Diameter (E) 2-3/4″ O/A Length (F) 18″ Horizontal Round Body Shell Diameter: 6″ Stanley P/N: AC-18 Replaces Part Number: 70243283, 79015990, AC-18 Models This Part Fits: 190 Reference Numbers: 70243283, 70243283-A, 79015990, AC-18