The Autolite  5503  Spark Plug is a high-quality ignition component designed for use in automobiles, trucks, and cars. Made with copper material and featuring a 14mm thread diameter, this vintage part is suitable for gasoline fuel systems. Manufactured in the United States, this spark plug comes with a 1-year manufacturer warranty and is ideal for customers looking for reliable ignition performance. With free shipping included, this Autolite spark plug is a convenient and dependable option for those needing a new ignition system component for their vehicle.