The McCormick A188851 is a genuine OEM piston designed for a wide range of Case IH and International Harvester agricultural machinery. This high-quality engine component ensures reliable performance and durability. It is compatible with various tractor models including the IH 454, 574, 674, 784, and Case IH 3220, 4230 series, among others. Key specifications include a bore of approximately 100 mm and a pin diameter of 35 mm, ensuring a precise fit and optimal engine function.