NGK BUHX 2522 Spark Plug

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.: 030´´ (0.75mm) - Center Electrode - Material: Nickel - Type: Standard - Size: 2.5mm - Projection: Non-Projected - Ground Electrode - Material: Nickel - Type: Surface Discharge - Resistor Value: 1K Ohm - Heat Range: 12 - Features: Booster Gap - Torque SpecsCast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.