{"product_id":"ngk-iridium-ix-spark-plugs-ltr6ix-11-6509-pack-of-8-extended-life-oe-fit","title":"NGK Iridium IX Spark Plugs LTR6IX-11 (6509) Pack of 8 — Extended Life, OE Fit","description":"\u003cp\u003e\u003cstrong\u003eNGK LTR6IX-11 (6509) Iridium IX spark plugs — a genuine 8-pack replacement engineered for consistent ignition performance and long service life.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis set contains eight authentic NGK Iridium IX LTR6IX-11 (part number 6509) spark plugs packaged with original hardware and labelling. Designed as direct OE-style replacements, these plugs are built to match factory fitment and to deliver reliable starting, smooth idle and efficient combustion across compatible vehicles. Always verify fitment for your specific make and model before installation.\u003c\/p\u003e\n\n\u003ch3\u003eWhat makes the Iridium IX LTR6IX-11 different from standard spark plugs?\u003c\/h3\u003e\n\u003cp\u003eThe Iridium IX series uses a fine iridium center electrode for higher durability and a longer service interval than conventional plugs. Its precision-tipped electrode improves ignition reliability and reduces misfires under demanding conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFine iridium center electrode for extended life\u003c\/li\u003e\n\u003cli\u003eOptimized firing tip for stronger spark energy\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant materials to maintain performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will these plugs affect my vehicle’s everyday driving?\u003c\/h3\u003e\n\u003cp\u003eWhen installed correctly, NGK Iridium IX plugs help maintain crisp throttle response, steady idle and reliable cold starts. They are particularly beneficial in vehicles that experience frequent short trips or stop-and-go traffic where consistent ignition matters most.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSmoother acceleration and throttle response\u003c\/li\u003e\n\u003cli\u003eStable idle with less hesitation\u003c\/li\u003e\n\u003cli\u003eReliable starts in a range of temperatures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these NGK LTR6IX-11 plugs a direct replacement for my engine?\u003c\/h3\u003e\n\u003cp\u003eThese plugs are manufactured to NGK specifications and intended as direct replacements for applications calling for LTR6IX-11 (6509). Confirm compatibility using your vehicle’s service manual or an online fitment tool before purchase to ensure correct thread size, reach and heat range.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect-replacement design for proper fit\u003c\/li\u003e\n\u003cli\u003eSupplied in original NGK packaging with hardware\u003c\/li\u003e\n\u003cli\u003eCheck OEM part references or fitment tools to confirm match\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I install and care for these spark plugs?\u003c\/h3\u003e\n\u003cp\u003eInstall plugs using a torque wrench to the manufacturer’s specified torque value and check electrode condition periodically. Proper gapping and installation technique prolong plug life and preserve engine efficiency.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGap and torque to vehicle manufacturer specifications\u003c\/li\u003e\n\u003cli\u003eUse anti-seize only if recommended by the service manual\u003c\/li\u003e\n\u003cli\u003eInspect plugs during routine maintenance intervals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This genuine NGK 8-pack of LTR6IX-11 (6509) Iridium IX spark plugs is suited for owners, independent mechanics and fleet managers who need reliable, OE-quality ignition parts in bulk. It’s a practical choice if your vehicle’s recommended replacement calls for this NGK part number, or if you maintain multiple vehicles that use the same plug. Choose this pack when you want authentic NGK components, original packaging, and consistent performance for routine service or scheduled maintenance.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this pack genuine NGK?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — this is an authentic NGK Iridium IX LTR6IX-11 (6509) set supplied in original NGK packaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can one pack service multiple engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: An eight-pack covers most four- or eight-cylinder engines and is convenient for multi-vehicle maintenance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48079844901022,"sku":"B07PJ52HYJ","price":101.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-ltr6ix-11-front-packaging.jpg?v=1785772606","url":"https:\/\/northtrailauto.ca\/products\/ngk-iridium-ix-spark-plugs-ltr6ix-11-6509-pack-of-8-extended-life-oe-fit","provider":"North Trail Auto","version":"1.0","type":"link"}