Editorial Reviews:
Synopsis
NGK Iridium IX Spark Plug, 10mm Thread, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Half Thread Type: 12.7mm (1/2") Threaded, 19mm (3/4") Total Reach, Resistor, Projected Tip, Stud Terminal, Partial Thread, Fine Wire (0.6mm) Iridium Center Electrode, Tapered Cut Ground Electrode, .035" (0.9mm) Gap, Heat Range 9. NOTE: Does not include terminal nut