Matching OEM #: 77839093000NGK's Laser Iridium Spark Plugs Provide Superior Ignitability and Long Service Life. Fine Wire Iridium Tipped Center Electrode and Fine Wire Platinum Tipped Ground Electrode Ensures Slow Wear Rate Providing Stable Idle, Superior Anti Fouling, Improved Fuel Efficiency and Lower Emissions. 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 individually Features Laser Welded Tips Trivalent Metal Plating Longest Life Available Shell Thread Size: 10mm Thread Pitch: 1.0mm Seat Type: Gasket Resistor: Yes Resistor Value: 5K Ohm Reach: 26.5mm (1.04") Hex Size: 9/16" (14mm) Terminal Type: Solid Overall Height: ISO Gap:. 039" (1.0mm) Center Electrode Material: Iridium Type: Fine Wire Size: 0.6mm Projection: Projected Ground Electrode Material: Platinum Type: Standard Shape: Taper Cut Quantity: 1 Specifications Torque Specs: Cast Iron: 7.2-10.8 lb. ft. Aluminum: 7.2-8.7 lb. ft. Brand: NGK Heat Range: 9 Longevity: 80-100k Note: Image for reference only, actual product may vary.