The John Deere M806440 is an authentic OEM cylinder head gasket, engineered to provide a reliable seal for the engine's cylinder head. This critical component prevents leaks of combustion gases, coolant, and oil, ensuring optimal engine performance and longevity. It is specifically designed for a range of John Deere utility tractors and compact utility tractors, including models such as the 4044R, 4049R, 4052R, 4066R, 4520, 4720, 4005, 4105, 4320, 4400, 4410, 4500, 4510, 4600, 4610, 4700, 4710, 4044M, 4049M, 4052M, and 4066M. Constructed from high-quality materials, this gasket ensures a precise fit and durable seal, maintaining engine integrity.