The McCormick 359121X1 Piston Ring Set is an essential component for maintaining engine performance in various International Harvester and McCormick tractor models. This high-quality replacement part ensures proper cylinder sealing, optimizing compression and reducing oil consumption. It is designed to fit models including the B275, B414, 354, 364, 384, 434, 444, and 276. Replace worn piston rings with this reliable set to restore engine efficiency and longevity.