A-AL61139-AI Pipe, Exhaust; 42.72"One New Aftermarket Replacement Exhaust Stack Pipe Fits John Deere Tractors This aftermarket exhaust stack pipe replaces OEM part number AL61139 and is designed to fit a wide range of Fits John Deere utility and row crop tractors. The curved top exhaust stack mounts to the upward exhaust system, venting combustion gases away from the engine and operator. At 42. 72" in length with a 2. 846" inner diameter, it is a direct fit replacement for the