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 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.. INFINITI EX37 2013, FX37 2013, G37 2013-2008, M37 2013-2011, Q40 2015, Q50 2015-2014, Q60 2015, Q70 2017-2014, Q70L 2017-2015, QX50 2017-2014, QX70 2017-2014, NISSAN 370Z 2017-2009, GT-R 2017-2009. RECOMMENDED USAGE: Modern vehicles using OE PSPE type spark plugs or for those seeking an aftermarket plug with the latest OE technology. NGK Ruthenium HX Spark Plug Box of 4 (LKAR8BHX). NGK Ruthenium HX High Ignitability Spark Plug. Ruthenium HX H. I. Spark Plug. High Ignitability Spark Plug. H. I. Spark Plug. Spark Plug

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