Denso (5358) IK20L Iridium Spark Plug, (Pack of 1)
14 millimeter thread size, 19 millimeter (3/4 inch) reach, 5/8 inch (16 millimeter) Hex size, gasket seat, resistor, removable terminal nut, ISO height, 0.4 millimeter iridium center electrode, tapered cut U-groove ground electrode, projected tip, .043 inch (1.1 millimeter) gap, heat range: 20.