The McCormick 6704424A3 is a genuine cylinder head gasket designed for McCormick X4 and X5 series agricultural tractors. This essential engine component ensures a proper seal between the cylinder head and engine block, preventing leaks and maintaining optimal engine compression and performance. It is a direct replacement part for various McCormick models including the X4.20, X4.30, X4.40, X4.40M, X4.50, X4.60, X4.70, X4.80, X4.90, X5.35, X5.45, X5.55, X5.65, and X5.75.