Automotive engines require substantial airflow to operate. This round air filter 1378060A00, akin to a high-efficiency “gas mask,” is precisely installed within the engine's intake ductwork. Its primary function is to filter out harmful particulates—such as dust and sand—from the air before it enters the engine's combustion chamber. The circular design ensures more even distribution as air passes through the filter mesh, enhancing airflow efficiency while increasing filtration area and adsorption capacity.