NGK Ruthenium HX High Ignitability spark plugs are the best in class plug for todays modern vehicles. Patented Ruthenium technology offers the most advance tip technology and delivers the highest performance and life expectancy. Created from advanced OE technology as a high ignitability plug; Ruthenium HX spark plugs come with patented, specialized OEM DFE and PSPE tip designs. NGK Ruthenium HX High Ignitability spark plugs provide a more complete fuel burn resulting in a quicker throttle response, smoother idle and better cold starts. Ruthenium center electrode provides industry leading durability.. 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.. NGK Ruthenium HX High Ignitability spark plugs are the best in class plug for today's modern vehicles. NGK's patented Ruthenium technology offers the most advance tip technology and delivers the highest performance and life expectancy.. CADILLAC ATS 2017-2016, CT6 2017-2016, CTS 2017-2014, XTS 2017-2014, FORD EDGE 2017-2015, F-150 2017-2015, FUSION 2018-2017, LINCOLN CONTINENTAL 2017, MKX 2017-2016, MKZ 2017. RECOMMENDED USAGE: Modern vehicles using OE PSPE type spark plugs or for those seeking an aftermarket plug with the latest OE technology. 0.4mm Ruthenium alloy fine wire center electrode and 0.8mm platinum fine wire ground electrode. Pure alumina silicate ceramic insulator provides superior strength and better heat transfer. Trivalent metal plating for superior anti-corrosion and anti-seizing properties. NGK Ruthenium HX Spark Plug Box of 4 (LTR7BHX). NGK Ruthenium HX High Ignitability Spark Plug. Corrugated ribs prevent flashover. Copper core aids in heat removal. Ruthenium HX H. I. Spark Plug. High Ignitability Spark Plug. H. I. Spark Plug. Spark Plug

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