ACDelco Gold (Professional) Air Filters are a high quality alternative to Original Equipment (OE) parts. They trap airborne particles before they enter the engine and supplies the cleanest possible air with the least airflow restriction to the engine. They enhance the performance and efficiency of the engine and extends its life. These engine air filters are equipped with a tight seal to keep unfiltered air from entering the combustion chamber. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.