The Autolite AP3923 Platinum Spark Plugs Pack of 4 is a high-quality product designed for use in gasoline engines. Made with platinum material, these spark plugs are durable and reliable for optimal engine performance. Manufactured by Autolite, a trusted brand known for quality automotive parts, these spark plugs are sure to provide efficient and consistent ignition for your vehicle. Made in the United States, these spark plugs are a great choice for car and truck owners looking to maintain their engine's ignition system.