The McCormick 6634088A1 is a genuine OEM piston ring designed for optimal engine performance and longevity in a range of McCormick agricultural tractors. This essential engine component ensures proper compression and oil control, contributing to efficient operation and reduced emissions. It is compatible with numerous McCormick models including the X4, X5, X6, X7, T-MAX, C-MAX, MC, and MTX series, ensuring a precise fit and reliable function.