The McCormick 1665737M91 piston is a genuine OEM component designed for various agricultural and industrial machinery. Featuring a precise 91.44mm diameter, this high-quality engine piston ensures optimal performance and durability. It is compatible with a wide range of Massey Ferguson 100, 200, 300, 500, 600, 800, 8000 Series and Industrial/Construction models, Landini 500, 60, 70, 80 Series and Industrial/Construction models, and McCormick CX Series tractors including CX70, CX80, CX90, and CX100. This essential engine part is crucial for maintaining engine compression and power.