Overview Product Description NGK TR6 Spark Plugs - Set of 8 554: 5K Ohm Ground Electrode Core Material: Nickel Core Ground Configuration: Standard Hex Size: 5/8" Thread Diameter: 14 Center Electrode Tip Material: Nickel w/ V-groove Ground Electrode Tip Design: Standard Gap Size: 0.04 Insulator Height: ISO Manufacturer Heat Range: 6 Reach: 17.5mm Ground Electrode Quantity: 1 Resistance: 5K Ohm Center Electrode Core Material: Copper Core Seat Type: Tapered Product Videos Custom Field Product Reviews
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