This air filter element captures airborne particulate before it enters the engine intake system. It sits in the housing mounted on the engine, where it removes debris from the incoming airstream to protect the turbocharger and combustion chamber from abrasive wear. A restricted element reduces airflow to the intake, which can cause a drop in engine power and an increase in fuel consumption. The manufacturer machines the sealing surfaces to match the housing geometry, ensuring the gasket seats correctly and no unfiltered air bypasses the element. On installation, inspect the housing seal and replace it if damaged.