The McCormick 3681950M91 is a genuine OEM engine block designed for a wide range of McCormick agricultural tractors. This critical component ensures the structural integrity of the engine, housing essential internal parts. It is compatible with various models including the MC, MTX, X6, X7, XTX, and ZTX series, providing reliable performance and a precise fit for engine overhauls or replacements. Weighing approximately 120 kg, this OEM part guarantees durability and optimal engine function.