These G-Power Platinum spark plugs deliver the power and quality that you expect from NGK. The fine pure-platinum electrode tip remains virtually unchanged and reaches self-cleaning temperatures to deliver longer durability and optimum performance. Compared to conventional plugs, G-Power plugs deliver better starts, superior acceleration, and greater fuel economy. Trivalent metal plating provides superior anti-corrosion and anti-seizing properties. Corrugated ribs prevent flashover. Trapezoid cut ground electrode reduces quenching. Shorty Spark Plug: No. Resistor: Yes. Manufacturer Heat Range: 4. Electrode Tip Material: Platinum. Electrode Core Material: Copper. Insulator Type: Projected. Spark Plug Thread Size: 14mm. Spark Plug Reach: 0.460 in. Spark Plug Seat Style: Tapered. Wrench Diameter: 5/8 in. Ground Strap Quantity: One.