Denso (5353) IXUH22 Iridium Spark Plug, (Pack of 1)
12 millimeter thread size, 26.5 millimeter (1.04 inch) reach, 5/8 inch (16 millimeter) Hex size, gasket seat, resistor, removable terminal nut, 0.4 millimeter iridium slight projection center electrode, tapered cut U-groove ground, .035 inch (0.9 millimeter) gap, heat range: 27.