The McCormick 3656100M91 is a genuine OEM air duct designed for optimal performance in McCormick MC series tractors, including models MC80, MC90, MC95, MC100, MC105, MC110, MC115, MC120, MC130, and MC135. This essential component is also compatible with Massey Ferguson 5400 and 6400 series tractors, such as 5425, 5435, 5445, 5455, 5460, 5465, 6445, 6455, 6460, 6465, 6470, 6475, and 6480 models. It ensures proper airflow within the machinery's system.