NGK BUZ8H 7447 Spark Plug Silver

Surface Gap Plugs Are Nearly Immune To Pre-Ignition, And Usually Require A Special High Energy Ignition System. They Can Be Susceptible To Fouling, Especially In Colder Applications, But May Be Necessary In High Compression Applications. Features: - 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 Specifications: - Shell - Thread Diameter: 14mm - Thread Pitch: 1.25mm - Seat Type: Gasket - Reach: 12.7mm (1/2´´) - Hex Size: 13/16´´ (21mm) - Terminal Type: Solid - Overall Height: Iso - Gap: .016´´ (0.4mm) - Center: Electrode - Material: Nickel - Type: Standard - Size: 2.5mm - Projection: Non-Projected - Type: Surface Discharge - Resistor: Yes - Resistor Type: Inductive - Resistor Value: 35 Ohms - Heat Range: 8 - Torque Specscast Iron: 18-25.3 Lb. Ft. Aluminum: 18-21.6 Lb. Ft.