The Spark Plug Autolite AP104 is a high-quality ignition system component designed for automotive use. Made by Autolite, a reputable brand in the industry, this spark plug is the AP104 model, suitable for a variety of vehicles. The California Prop 65 Warning indicates that it contains nickel, a common material used in spark plugs. This product is essential for maintaining the proper functioning of your car or truck's engine, ensuring optimal performance and efficiency.Ford, Lincoln, Mercury, and Cadillac vehicles, particularly V8 engines from 1997-2010. Common applications include the Ford F-150 (1997-2010), Ford Expedition (1997-2004), Ford Focus (2004-2011), and Ford Explorer (1996-2005). It also fits models like the Buick Lucerne (2006-2011) and Cadillac DeVille (1997-2005).