This internal air filter element is installed in the engine intake system of a self-propelled forage harvester or combine. It captures airborne particulate before it reaches the intake manifold, protecting the turbocharger and combustion chamber from abrasive debris. A clogged filter restricts airflow, causing a drop in engine power and increased fuel consumption. The filter is constructed by Mann-Filter to match the original assembly's pleat count and media density, which ensures the housing's seal surface is fully engaged and the bypass valve opens at the correct differential pressure. Replace the filter at the interval specified for the host machine; no additional gaskets or seals are required for installation.