A-AL61138-AI Pipe, Exhaust; 50.39"One New Aftermarket Replacement Exhaust Pipe Fits John Deere Tractors This 50. 39 inch (1280mm) exhaust stack pipe is a direct aftermarket replacement for the Fits John Deere OEM part AL61138. It routes exhaust gases from the muffler assembly upward and away from the tractor on a wide range of Fits John Deere 2 and 3 series utility tractors. The pipe is finished in a heat resistant black coating for durability under high temperature exhaust