NGK Standard Series spark plugs are designed for stock replacement applications. These plugs have a hotter spark, which means better combustion and that improves performance, while producing less harmful emissions. Shorty Spark Plug: No. Resistor: Yes. Manufacturer Heat Range: 5. Electrode Tip Material: Nickel alloy. Electrode Core Material: Copper. Spark Plug Thread Size: 14mm. Spark Plug Reach: 26.5mm. Spark Plug Seat Style: Gasket. Wrench Diameter: 5/8 in. Ground Strap Quantity: One Engine V8, Engine Size 5.7L/345 Engine Family Hemi Gen III Trivalent metal plating provides superior anti-corrosion and anti-seizing properties. Corrugated ribs prevent flashover. Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer. Copper core aids in heat removal. Triple seals prevent leakage Sold In 8 Pack Brand Name NGK Unit Count 8.0 Count Item Weight 0.72 Pounds Thread Size 14 millimeters Manufacturer NGK Model Number 92174 Core Material Copper Top Material Type Ceramic, Metal, Nickel Automotive Fit Type Vehicle Specific Fit Included Components 92174 Manufacturer Part Number DZNGK-12030 Compatible with Vehicle Type Car, Truck Manufacturer Warranty Description Includes manufacturer provided warranty