5-rib design prevents flashover while lessening voltage loss
Copper glass seal bonds the center electrode and insulator together for a gas-tight seal
Platinum center electrode utilizes platinum to shrink the surface area of the center electrode tip for utmost firing performance and minimum voltage requirements
These Spark Plugs are constructed with heavy duty insulator for unmatched dielectric power and thermal conductivity under extreme temperatures. Denso employs platinum to both the center and ground electrodes for advanced resistance to erosion and corrosion.