NGK V-Power plugs feature a unique v-cut in the center electrode that directs the spark to the edge of the electrode, helping the spark develop more rapidly, increasing ignitability and reducing quenching. 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 Shell Thread Diameter 14mm Thread Pitch 1.25mm Seat Type Gasket Reach 19mm (3/4") Hex Size 5/8" (16mm) Terminal Type Solid Overall Height ISO Gap .024" (0.6mm) Center Electrode Material Nickel Type Standard Size 2.5mm Projection Projected Ground Electrode Material Nickel Type Semi-Surface Discharge Specifications Resistor Yes Resistor Value 5k Ohm Heat Range 7 Features Intermittent Gap Torque Specs Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.
