NGK DR4HS 3326 Spark Plug

NGK standard plugs are constructed for longer life and optimum performance. Features: - 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 Specifications: Shell: - Thread Diameter: 12mm - Thread Pitch: 1.25mm - Seat Type: Gasket - Reach: 12.7mm (1/2´´) - Hex Size: 18mm - Terminal Type: Threaded Stud - Overall Height: ISO - Gap.: 028´´ (0.7mm) - Center Electrode - Material: Nickel - Type: Standard - Size: 2.5mm - Ground Electrode - Resistor: Yes - Resistor Value: 5k Ohm - Heat Range: 4 - Torque SpecsCast Iron: 10.8-18 lb. ft. Aluminum: 10.8-14.5 lb. ft.