ACDelco GM Original Equipment Air Filters are designed, engineered, and tested to rigorous standards, and are backed by General Motors. They trap airborne particles before they enter the engine and supply 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 GM Original Equipment parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional.