{"product_id":"c7-corvette-grand-sport-ngk-ruthenium-hx-spark-plugs-lt1","title":"C7 Corvette Grand Sport NGK Ruthenium HX Spark Plugs - LT1","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1359\/4413\/files\/cca-9-99-shipping-performance-banner-v2.2.png?v=1784322136\" alt=\"CCA $9.99 shipping - Continental U.S.\" width=\"1458\" height=\"240\" style=\"display:block;width:100%;height:auto;\"\u003e\u003c\/p\u003e\n\u003ch2\u003eNGK Ruthenium HX LTR5AHX Spark Plugs for C7 Corvette Grand Sport LT1\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eNGK Ruthenium HX LTR5AHX spark plugs\u003c\/strong\u003e, \u003cstrong\u003estock number 90220\u003c\/strong\u003e, fit the \u003cstrong\u003e2017–2019 C7 Corvette Grand Sport\u003c\/strong\u003e with the stock \u003cstrong\u003eLT1 6.2L V8\u003c\/strong\u003e. This offer supplies \u003cstrong\u003eeight spark plugs as two manufacturer packs of four\u003c\/strong\u003e for a complete spark-plug replacement and regular street maintenance.\u003c\/p\u003e\n\u003cp\u003eFor a stock C7 Grand Sport, spark-plug selection follows the naturally aspirated 6.2L LT1 under the hood. Ruthenium HX uses \u003cstrong\u003eopposed fine firing tips in a Double Fine Electrode layout\u003c\/strong\u003e: ruthenium alloy at the center and platinum on the ground electrode. That design supports high ignitability and firing-tip durability for street-driven Grand Sport coupes and convertibles.\u003c\/p\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExact product:\u003c\/strong\u003e NGK 90220, design code LTR5AHX, Ruthenium HX.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble Fine Electrode design:\u003c\/strong\u003e A fine ruthenium-alloy center firing tip works opposite a fine platinum ground tip.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecious-metal construction:\u003c\/strong\u003e The firing-tip materials combine high ignitability with resistance to electrode wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete V8 quantity:\u003c\/strong\u003e Eight matching plugs in two four-packs; order quantity one supplies one engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage contents:\u003c\/strong\u003e Spark plugs only. Ignition wires and coils are separate components and are not included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBenefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-ignitability firing end:\u003c\/strong\u003e The DFE arrangement helps the spark initiate combustion of the air-fuel mixture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWear-resistant firing tips:\u003c\/strong\u003e Precious-metal electrode surfaces help maintain the firing end through repeated sparking during normal street service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrand Sport road-use service:\u003c\/strong\u003e Fit eight matching plugs when refreshing the stock LT1 for everyday drives and weekend outings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrand Sport year break:\u003c\/strong\u003e C7 Grand Sport coverage begins with the 2017 model year and continues through 2019. Match that model-year range with the stock naturally aspirated LT1 6.2L before selecting your replacement plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYour Grand Sport configuration:\u003c\/strong\u003e Coupe and convertible body styles are covered with manual or automatic transmissions. Check the existing plug-wire boots and follow the LT1 service procedure when removing and installing the plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation gap:\u003c\/strong\u003e Use \u003cstrong\u003e0.040 inch (1.02 mm)\u003c\/strong\u003e for this stock LT1 fitment. Measure every plug before installation; the supplied preset is not a substitute for the vehicle-specific setting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect the firing tips:\u003c\/strong\u003e Use a round-wire or pin gauge to check the gap. Any adjustment must move only the ground electrode without pressure on the center tip or ceramic insulator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDry-thread installation:\u003c\/strong\u003e Install these NGK plugs without anti-seize or lubricant on the threads. Added lubricant changes the tightening conditions, so keep the threads dry and use the vehicle’s specified installation procedure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect before fitting:\u003c\/strong\u003e Check each replacement plug for handling damage before installation. If a plug has been dropped or its fine firing tips appear damaged, have it checked before use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModified engines:\u003c\/strong\u003e Have your engine builder or tuner confirm spark-plug requirements if your LT1 has been modified.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #ff0000;\"\u003eCORVETTE COMPATIBILITY\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2017–2019 C7 Corvette Grand Sport\u003c\/li\u003e\n\u003cli\u003eCoupe and convertible\u003c\/li\u003e\n\u003cli\u003eLT1 6.2L naturally aspirated V8, stock configuration\u003c\/li\u003e\n\u003cli\u003eManual and automatic transmissions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Buy from Custom Corvette Accessories?\u003c\/h3\u003e\n\u003cp\u003eAt Custom Corvette Accessories, we’re Corvette owners ourselves, and we offer \u003cstrong\u003eone-on-one customer service\u003c\/strong\u003e to help you choose parts for your car. Have a question about \u003cstrong\u003eNGK 90220 LTR5AHX Ruthenium HX spark plugs\u003c\/strong\u003e for your C7 Corvette Grand Sport LT1? Contact us for personal help before you order.\u003c\/p\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":67715332014317,"sku":"90220","price":143.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1359\/4413\/files\/ngk-ruthenium-hx-ltr5ahx-owner-full-plug.png?v=1791748012","url":"https:\/\/www.corvettepartsandaccessories.com\/products\/c7-corvette-grand-sport-ngk-ruthenium-hx-spark-plugs-lt1","provider":"Corvette Parts from Custom Corvette Accessories","version":"1.0","type":"link"}