Compare Maximum number of 4 items selected Champion Racing Spark Plug - 1028 Part #: 1028 Line: CHP Champion Racing Spark Plug Manufacturer's Defect Warranty Seat: Flat Thread Size: M14 Heat Range: 57 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: Nickel Show More Show Less