NGK TR55 (Pack of 4) Spark Plug
- Solid copper core for greater spark
- Longer insulator nose prevents fouling
- Corrugated ribs on insulator prevents flashover
- Zinc dipped shell prevents corrosion
- Triple gasket seal eliminates combustion gas leakage
- Designed to operate over a much wider heat range than ordinary plugs
- Resists carbon buildup and pre-ignition