Compare Champion Copper Plug Number RA4HC Spark Plug - 905 Part #: 905 Line: CHP Champion Copper Plug Number RA4HC Spark Plug 1 Year Limited Warranty Seat: Gasket Heat Range: 4 Hex Size (mm): 16mm Hex Size (in): 5/8 Inch Preset Gap (in): 0.025 Inch Preset Gap (mm): 0.65mm Thread Reach (in): 0.750 Inch Center Electrode Tip Material: Copper Insulator Height (in): 0.030 Inch Ground Electrode Tip Material: Nickel Service Number: RA4HC Metallurgy: Copper Show More Show Less
Compare ACCEL Spark Plug Spark Plug - 8198 Part #: 8198 Line: ACC ACCEL Spark Plug Spark Plug 1 Year Limited Warranty Seat: Tapered Thread Size: M14 Heat Range: 4 Hex Size (in): 5/8 Inch Preset Gap (in): 0.035 Inch Thread Reach (in): 0.460 Inch Resistor Plug: Yes Center Electrode Core Material: Copper Center Electrode Tip Material: Copper Metallurgy: Copper Show More Show Less