Seller notes

NGK Ruthenium HX Spark Plug Box of 4 (FR5AHX)Part Number 95839 High-Ignitability Spark PlugsRuthenium HX™ brings the most advanced spark plug technology to the automotive aftermarket, delivering better efficiency and power for today’s engines. 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 con...

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