Compare Maximum number of 4 items selected Champion Racing Spark Plug - 290 Part #: 290 Line: CHP Champion Racing Spark Plug Manufacturer's Defect Warranty Seat: Gasket Thread Size: M14 Heat Range: 59 Hex Size (mm): 21mm Hex Size (in): 13/16 Inch Preset Gap (in): 0.025 Inch Preset Gap (mm): 0.64mm Thread Reach (in): 0.750 Inch Center Electrode Tip Material: Nickel Insulator Height (in): 0.060 Inch Ground Electrode Tip Material: Nickel Metallurgy: Copper Show More Show Less