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: 5. 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. Engine V8, Engine Size 7.4L/454 Engine Family Chevy big block Gen V Trivalent metal plating provides superior anti-corrosion and anti-seizing properties. Corrugated ribs prevent flashover. Trapezoid cut ground electrode reduces quenching. Copper core aids in heat removal. Triple seals prevent leakage. Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer. Fine wire platinum tipped center electrode reduces required voltage for better starts, superior acceleration and increased fuel economy Sold In 8 Pack Brand Name NGK Unit Count 8.0 Count Item Weight 10.24 ounces Thread Size 14 millimeters Manufacturer NGK Model Number 3547 Core Material Platinum Top Material Type Ceramic, Metal Automotive Fit Type Vehicle Specific Fit Included Components 3547 Manufacturer Part Number DZNGK-46817 Compatible with Vehicle Type Car, Truck Manufacturer Warranty Description Includes manufacturer provided warranty