Compare Maximum number of 4 items selected NGK Iridium Plug Number ER8EHIX Spark Plug - 8201 Part #: 8201 Line: NGK NGK Iridium Plug Number ER8EHIX Spark Plug 1 Year Limited Warranty Seat: Gasket Thread Size: M8-1.0 Heat Range: 8 Hex Size (mm): 13mm Hex Size (in): 1/2 Inch Preset Gap (in): 0.028 Inch Preset Gap (mm): 0.7mm Thread Reach (in): 0.750 Inch Center Electrode Core Material: Nickel-Copper Alloy Center Electrode Tip Material: Iridium Approximate Resistor Value (Ohm): 5000 Ohm Insulator Height (mm): 43.5mm Insulator Height (in): 1.710 Inch Ground Electrode Tip Material: Copper, Nickel Thread Reach (mm): 19mm Service Number: ER8EHIX Metallurgy: Iridium Show More Show Less