Champion Iridium Plug Number RE14WMPB5 Spark Plug - 9403 Part #: 9403 Line: CHP Champion Iridium Plug Number RE14WMPB5 Spark Plug 2 Year LIMITED WARRANTY Seat: Tapered Thread Size: M14 Heat Range: 14 Hex Size (in): 5/8 Inch Preset Gap (in): 0.045 Inch Preset Gap (mm): 1.15mm Center Electrode Tip Material: Iridium Ground Electrode Tip Material: Platinum Service Number: RE14WMPB5 Metallurgy: Iridium/Platinum Show More Show Less