The McCormick 380770R91 is a genuine OEM cylinder head gasket designed for International Harvester (IH) and McCormick tractors. This critical engine component ensures a proper seal between the cylinder head and engine block, preventing leaks and maintaining optimal engine compression. It is compatible with various IH tractor models, including B275, B414, 354, 374, 434, and 444, providing a reliable replacement for maintaining engine integrity.