The McCormick 6656303A1 is a genuine OEM piston ring designed for a wide range of McCormick agricultural tractors. This essential engine component ensures proper compression and oil control, contributing to efficient and reliable engine operation. It is compatible with various McCormick CX, MC, MTX, X, X70, XTX, and X8 series models, providing a precise fit and restoring peak engine performance. Trust in genuine McCormick parts for durability and compatibility.