The McCormick 6513391M1 is a genuine OEM piston ring designed for a wide range of McCormick agricultural tractors, including models from the CX, MC, MTX, T, and XTX series. This critical engine component helps maintain proper compression and oil control within the cylinder. It is also cross-referenced with Case IH and New Holland part numbers, indicating its use across compatible CNH Industrial engines. This piston ring has a bore diameter of 100 mm and a thickness of 3 mm, ensuring a precise fit and reliable operation for engine maintenance and repair.