{"product_id":"c5-corvette-ngk-iridium-ix-spark-plugs-ls1","title":"C5 Corvette NGK Iridium IX 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 Iridium IX TR5IX Spark Plugs for C5 Corvette LS1\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eNGK Iridium IX TR5IX spark plugs\u003c\/strong\u003e, \u003cstrong\u003estock number 7397\u003c\/strong\u003e, fit the \u003cstrong\u003e1997–2004 C5 Corvette\u003c\/strong\u003e with the \u003cstrong\u003eLS1 5.7L engine\u003c\/strong\u003e. This offer includes \u003cstrong\u003eeight spark plugs supplied as two packs of four\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eA C5 plug service is a chance to give all eight LS1 cylinders the same replacement plug design. The fine iridium firing tip supports a \u003cstrong\u003estable spark and resists electrode wear\u003c\/strong\u003e, while the plated shell helps protect the threads during service. Whether you drive your Corvette regularly or bring it out for weekend trips, this set keeps the full V8 plug quantity together in one order.\u003c\/p\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK stock number:\u003c\/strong\u003e 7397; \u003cstrong\u003edesign code:\u003c\/strong\u003e TR5IX.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine-wire iridium center electrode:\u003c\/strong\u003e A durable firing tip designed to maintain a consistent spark.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEight spark plugs:\u003c\/strong\u003e Two manufacturer packs of four, enough for one V8.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpark plugs only:\u003c\/strong\u003e Plug wires and ignition coils are separate components and are not included.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrivalent shell plating:\u003c\/strong\u003e Helps resist corrosion and supports removal at a later plug service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBenefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne complete plug order:\u003c\/strong\u003e Replace all eight plugs with a matching Iridium IX design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable firing tip:\u003c\/strong\u003e Iridium resists electrode wear while supporting stable ignition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService-friendly protection:\u003c\/strong\u003e Plated shells help protect the threads when your LS1 is due for its next plug change.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody-style coverage:\u003c\/strong\u003e LS1 coupe fitment runs from 1997–2004, convertible fitment from 1998–2004, and Fixed Roof Coupe fitment from 1999–2000. Match your own car’s year and engine before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor an engine-swapped C5:\u003c\/strong\u003e Have your installer confirm the plug requirements for the engine actually fitted. The original body style alone does not establish the correct plug selection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck before fitting:\u003c\/strong\u003e Confirm TR5IX and 7397 on the plugs and packaging, then inspect the ceramic insulators and electrodes for damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation gap:\u003c\/strong\u003e Use 0.040 inch for this stock LS1 fitment. Measure every plug before installation; the supplied gap is not a substitute for the vehicle’s required setting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtect the fine tip:\u003c\/strong\u003e Use a round-wire or pin gauge. Any adjustment must move only the ground electrode without levering against the center tip. Ask a qualified installer if a large adjustment is needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDry threads and correct torque:\u003c\/strong\u003e Do not add anti-seize or lubricant. Follow the vehicle’s tightening specification so the plug seats correctly and transfers heat as intended.\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 engine, 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 7397 TR5IX Iridium IX 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":67714803466477,"sku":"7397","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1359\/4413\/files\/ngk-iridium-ix-corvette-spark-plug.png?v=1791740597","url":"https:\/\/www.corvettepartsandaccessories.com\/products\/c5-corvette-ngk-iridium-ix-spark-plugs-ls1","provider":"Corvette Parts from Custom Corvette Accessories","version":"1.0","type":"link"}