Ruthenium HX Spark Plug by NGK NGK Ruthenium HX is designed for newer engines which demand high ignitability. Double Fine Electrode (DFE) design promotes spark energy concentration and ignites a wider range of air-fuel ratios, offering improved performance in rich or lean engine conditions. 0.4mm Ruthenium alloy fine wire center electrode and 0.8mm platinum fine wire ground electrode. Trivalent metal platinum 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. Features DFE & PSPE tip designs Superior oxidation resistance Advanced high-ignitability technology Enhanced blistering/anti-peeling Benefits Provides more complete fuel burn than other precious metal spark plugs Quicker throttle response Smoother idle and better cold starts Applications 2011 Hyundai Elantra GLS/Limited 2009 Hyundai Genesis 2009 Kia Borrego EX/LX What’s In The Box? 1 – Ruthenium Spark Plug Warranty 60 Day Warranty