The McCormick 4221056M91 is a genuine OEM air filter designed to provide superior engine protection for a wide range of McCormick X-series tractors. This high-quality filter effectively removes dust, dirt, and debris from the air intake, preventing premature engine wear and maintaining optimal combustion efficiency. It is also cross-referenced as an OEM part for Massey Ferguson, Landini, Fendt, and Valtra agricultural machinery, ensuring broad compatibility and reliable performance across multiple brands.