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 colder applications, but may be necessary in high compression applications.

• 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