ngk r6725-105, spark plug, racing, gasket seat, 14mm thread, .846 in. reach, resistor, each

NGK Racing Series Plugs are Engineered to Withstand the Harshest Engine Conditions. Special Insulator Nose Configurations Improve Throttle Response. 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. Plug Specifications: Thread Size: 14mm. Hex Size: 20.6mm. Reach: 21.5mm. Seat Type: Gasket. Gap: 0.7mm. Terminal Type: Solid. Resistor: Yes.