The McCormick 6633817A1 Piston is a genuine OEM replacement part designed for various McCormick, Landini, Argo Tractors, and Valpadana agricultural machinery. This essential engine component ensures optimal performance and durability. It is compatible with McCormick X4 and X5 series, Landini 4-series, 5-series, and REX models, as well as equivalent Argo Tractors and Valpadana machines. This piston measures 114.3 mm in length, width, and height, with a weight of 0.544 kg.