Iridium IX Spark Plug by NGK NGK IX Iridium Series plugs were designed specifically for the performance enthusiast. Fine wire center electrode ensures high durability and a consistently stable spark. Iridium alloy has an extremely high melting point, perfect for today’s high-tech, high performance engines. Features Trivalent metal plating Corrugated ribs Pure alumina silicate ceramic insulator Copper core aids in heat removal Triple seals prevent leakage Benefits Consistently stable spark Increased durability Extremely high melting point Superior anti-corrosion and anti-seizing properties Prevent flashover provides superior strength and better heat transfer Applications Universal What’s In The Box? 1 – Iridium IX Spark Plug Warranty 60 Day Warranty