NGK gold palladium plugs feature a fine wire gold palladium center electrode for improved ignitability, increased durability and enhanced anti-fouling capabilities. Trivalent metal plating provides superior anti-corrosion and anti-seizing properties. Corrugated ribs prevent flashover. Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer. Copper core aids in heat removal. Triple seals prevent leakage.