2.Three-Stage Ignition: forms a large flame nucleus for fuller fuel, more economical and more practical.
3.Outer Seal: prevents gas from escaping and prevents engine shudder.
4.Insulator: new ceramic insulator provides better insulation for heat dissipation.
5.Metal Bolts: Titanium plated finish for high and low temperature resistance and corrosion protection.
6.360°C Laser Welding Technology: Non-corrosive, lower spark plug gap wear, longer life.