Surface Gap Plugs are Nearly Immune to Pre-Ignition, and Usually Require a Special High Energy Ignition System. They Can be Susceptible to Fouling, Especially in bColder Applications, but May be Necessary in High Compression Applications.Trivalent Metal Plating Provides Superior Anti-Corrosion and Anti-Seizing PropertiesCorrugated Ribs Prevent FlashoverPure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat TransferCopper Core Aids in Heat RemovalTriple Seals Prevent Leakage