One New Aftermarket Muffler Fits IH/FARMALL Models: 756 (With C291 Engine On Gas Or LPG), 706 (With C263 Or C291 Engine On Gas Or LPG), 856 (With C301 Engine On Gas Or LPG), 806 (With C301 Engine On Gas) Technical Information: – Vertical Exhaust – Inlet Port 2 15/16″ ID – Outlet Port 3″ OD – Overall Length 34″ – Use R1805 Rain Cap – Use R1756 Clamp – (IH-19) Replaces Part Number(s): 398511R1 Models This Part Fits: 756 Reference Numbers: 398511R1