The McCormick 6638580A1 is a genuine OEM brake caliper designed for a wide range of McCormick agricultural machinery. This essential component ensures reliable braking performance across various tractor series including F, V, T, C, CX, MC, MTX, XTX, X7, X6, X5, X4, and X3 models. It is also cross-referenced with Case IH and International Harvester part numbers 3326164R1, 3326164R2, 3326164R3, 3326164R4, 3326164R5, and 3326164R6, confirming its broad compatibility and quality.