Champion Iridium Plug Number RE14WLPB5 Spark Plug - 9440 Part #: 9440 Line: CHP Champion Iridium Plug Number RE14WLPB5 Spark Plug 2 Year LIMITED WARRANTY Seat: Tapered Thread Size: M14 Heat Range: 14 Hex Size (in): 5/8 Inch Thread Reach (in): 1 Inch Center Electrode Tip Material: Iridium Ground Electrode Tip Material: Platinum Service Number: RE14WLPB5 Metallurgy: Iridium/Platinum Show More Show Less