ACDelco GM Original Equipment Air Filters are designed, engineered, and tested to rigorous standards, and are backed by General Motors.of the engine. These engine air filters are equipped with a tight seal to help 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.