The Autolite XP606 spark plug is a high-performance ignition component designed for use in gasoline engines. Made with iridium-enhanced alloy, it features a 14mm thread diameter, 16mm hex size, and 12V voltage. This spark plug is compatible with several vehicles, including the Eldorado, Seville, Savana, and Intrigue V6 and V8 models. With an installation depth of 17mm, the Autolite XP606 is a reliable and durable choice for any driver seeking improved engine performance.