{"product_id":"c5-corvette-ngk-ruthenium-hx-spark-plugs-ls1","title":"C5 Corvette NGK Ruthenium HX Spark Plugs - LS1","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 TR5AHX Spark Plugs for C5 Corvette LS1\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eNGK Ruthenium HX TR5AHX spark plugs\u003c\/strong\u003e, \u003cstrong\u003estock number 94567\u003c\/strong\u003e, fit the \u003cstrong\u003e1997–2004 C5 Corvette\u003c\/strong\u003e with the \u003cstrong\u003eLS1 5.7L engine\u003c\/strong\u003e in stock configuration. This offer includes \u003cstrong\u003eeight spark plugs supplied as two manufacturer packs of four\u003c\/strong\u003e for a full V8 spark-plug replacement.\u003c\/p\u003e\n\u003cp\u003eFor an LS1-powered C5 that sees regular road use, Ruthenium HX brings a \u003cstrong\u003edouble-fine-electrode firing design\u003c\/strong\u003e to a complete plug replacement. Its ruthenium-alloy center tip faces a fine platinum ground tip, helping the spark ignite the mixture with less interference around the firing point. The result is a high-ignitability design suited to maintaining your stock 5.7L engine.\u003c\/p\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExact plug identity:\u003c\/strong\u003e NGK 94567, design code TR5AHX, Ruthenium HX.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble Fine Electrode design:\u003c\/strong\u003e Fine ruthenium-alloy center and platinum ground firing tips support high ignitability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecious-metal firing surfaces:\u003c\/strong\u003e The ruthenium-alloy center tip provides resistance to wear during repeated sparking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete V8 quantity:\u003c\/strong\u003e Eight matching plugs in two four-packs; select order quantity one for one engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded components:\u003c\/strong\u003e Spark plugs only. Plug wires and ignition coils are separate 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 construction:\u003c\/strong\u003e Opposed fine tips help the spark initiate combustion of the air-fuel mixture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWear-resistant firing surface:\u003c\/strong\u003e The ruthenium-alloy center electrode helps resist wear over repeated ignition cycles during regular street use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete LS1 maintenance:\u003c\/strong\u003e Renew all eight spark plugs together for regular road use in your C5 coupe, convertible or Fixed Roof Coupe.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody-style years:\u003c\/strong\u003e Match your LS1 coupe to 1997–2004, convertible to 1998–2004, or Fixed Roof Coupe to 1999–2000. Those body-style dates keep the service set matched to your C5.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed Roof Coupe selection:\u003c\/strong\u003e A 1999–2000 FRC retains the 5.7L LS1 fitment covered here. Confirm the engine in the car when ordering, especially if its service history includes an engine replacement.\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 LS1 fitment. Measure every plug before installation; do not assume the gap supplied in the box is the required vehicle setting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect both firing tips:\u003c\/strong\u003e Check with a round-wire or pin gauge. Any adjustment must move only the ground electrode without pressure on the center tip; ask a qualified installer if unsure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation care:\u003c\/strong\u003e Use clean, dry threads without anti-seize and follow the vehicle tightening specification. Have your engine builder or tuner confirm plug requirements if the engine 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\u003e1997–2004 C5 Corvette LS1 coupe\u003c\/li\u003e\n\u003cli\u003e1998–2004 C5 Corvette LS1 convertible\u003c\/li\u003e\n\u003cli\u003e1999–2000 C5 Corvette LS1 Fixed Roof Coupe\u003c\/li\u003e\n\u003cli\u003eLS1 5.7L V8, stock configuration\u003c\/li\u003e\n\u003cli\u003eManual and automatic transmissions; FRC manual\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 94567 TR5AHX Ruthenium HX spark plugs\u003c\/strong\u003e for your C5 Corvette LS1? Contact us for personal help before you order.\u003c\/p\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":67715210739949,"sku":"94567","price":143.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1359\/4413\/files\/ngk-ruthenium-hx-spark-plug-full-view_bcf79f16-d243-4125-ba95-4ffe2729d5c2.png?v=1791742885","url":"https:\/\/www.corvettepartsandaccessories.com\/products\/c5-corvette-ngk-ruthenium-hx-spark-plugs-ls1","provider":"Corvette Parts from Custom Corvette Accessories","version":"1.0","type":"link"}