NGK 6240 PLFR5A-11 Laser Platinum Spark Plug 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; Torque Specs: Cast Iron: 18-25.3 lb. ft; Overall Height : height of the spark plug from the seat to the top of the terminal nut is 50.5mm (1.98-inch) You can depend on NGK for quality and reliability Features trivalent metal plating which provide long lasting durability Includes laser welded platinum center electrode tip offering faster starts and quicker acceleration Equipped with platinum disc welded behind the ground electrode Better fuel economy and reduced emissions