NGK Ruthenium HX Spark Plug Box of 4 (LKAR6AHX)

This is a box of four NGK Ruthenium HX spark plugs, part number LKAR6AHX. These plugs are designed for modern engines that require high ignitability, offering a more complete fuel burn. You can expect a quicker throttle response, a smoother idle, and better cold starts with these installed. They fit a range of vehicles, including popular models like the Nissan Altima, Frontier, and Chevrolet City Express.

The key to their performance is NGK's patented Ruthenium technology, featuring a 0.4mm Ruthenium alloy fine wire center electrode and a 0.4mm platinum fine wire ground electrode. This Double Fine Electrode (DFE) design helps concentrate spark energy, igniting a wider range of air-fuel mixtures, which is beneficial in both rich and lean conditions. The pure alumina silicate ceramic insulator provides strength and helps with heat transfer, while the trivalent metal plating resists corrosion and seizing. A copper core is also included to help manage heat.