The McCormick 6637615A1 is a genuine OEM engine oil filter designed to provide superior filtration and protection for various McCormick X-series tractors. This essential component helps maintain engine longevity by removing contaminants from the lubricating oil, ensuring clean oil circulation and optimal engine performance. It is a direct replacement part for models including X4.20, X4.30, X4.40, X4.50, X4.60, X5.35, X5.45, X5.55, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680.