AC DELCO AIR FILTER AC Delco air filter uses world-class filter element technology that shields the engine from most airborne dust and dirt. It provides excellent filter capacity and durability with tight seals that help prevent unfiltered air from entering the engine. Notes Replaces part number 25311966 Material: Paper Type: Disposable Product Fit: Direct Fit Quantity Sold: Sold Individually Recommended Use: OE Replacement Style: Dry Anticipated Ship Out Time: 1-2 Business Days Part Number: A1509C