{"product_id":"ngk-iridium-spark-plugs-ltr6ix-11-6-pack-fine-iridium-tip-for-long-life-and-stable-ignition","title":"NGK Iridium Spark Plugs LTR6IX-11 — 6-Pack, Fine Iridium Tip for Long Life and Stable Ignition","description":"\u003cp\u003e\u003cstrong\u003eNGK LTR6IX-11 iridium spark plugs (model 6509) are high-performance replacement plugs sold in packs of six for consistent ignition and long electrode life.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese NGK LTR6IX-11 plugs use a fine iridium center electrode and precision-ground design to provide dependable spark delivery and durable wear resistance. Supplied as a six-piece set, they’re intended for mechanics, DIYers and vehicle owners who need a full-plug change or keep spares on hand. The LTR6IX-11 fits specific engine applications — check compatibility with your vehicle’s service manual or parts lookup.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these iridium plugs improve ignition stability?\u003c\/h3\u003e\n\u003cp\u003eThe iridium center electrode has a very small diameter that concentrates the electrical discharge, producing a more consistent and efficient spark compared with larger electrodes. That consistency helps with smoother starts and steadier running across different engine loads and temperatures.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFine iridium tip for concentrated spark energy\u003c\/li\u003e\n  \u003cli\u003ePrecision-ground electrode for predictable firing\u003c\/li\u003e\n  \u003cli\u003eStable spark across idle, cruise and acceleration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the durability and maintenance advantages?\u003c\/h3\u003e\n\u003cp\u003eIridium alloys are far harder and more wear-resistant than conventional nickel electrodes, so these plugs typically retain gap integrity and performance for longer service intervals. You’ll likely need fewer replacements over time compared with standard plugs, reducing maintenance frequency and parts cost.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLong-lasting iridium construction resists erosion\u003c\/li\u003e\n  \u003cli\u003eMaintains gap accuracy over extended mileage\u003c\/li\u003e\n  \u003cli\u003eSold as a six-pack to replace all cylinders at once\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich engines and situations are they best suited for?\u003c\/h3\u003e\n\u003cp\u003eThe LTR6IX-11 is designed for compatible gasoline engines that specify this heat range and thread size; it’s commonly used in small to medium displacement engines where a long-life, fine-electrode plug is desired. Ideal uses include routine tune-ups, performance upgrades, or preventive maintenance before seasonal use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSuitable for engines calling for LTR6IX-11 specifications\u003c\/li\u003e\n  \u003cli\u003eGood choice for vehicles needing extended service intervals\u003c\/li\u003e\n  \u003cli\u003eHandy six-pack for complete multi-cylinder replacements\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there installation tips or compatibility checks to follow?\u003c\/h3\u003e\n\u003cp\u003eAlways verify thread size, reach, and heat range against your vehicle’s manufacturer recommendations before installation. Use a torque wrench to the manufacturer’s torque spec to avoid over-tightening, and check ignition coil boots or leads for wear when replacing plugs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm fitment with OEM part number or vehicle lookup\u003c\/li\u003e\n  \u003cli\u003eHand-start threads, then torque to spec to prevent damage\u003c\/li\u003e\n  \u003cli\u003eInspect wires\/coils and replace together if needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The NGK LTR6IX-11 6-piece set is aimed at owners and technicians who want a reliable, long-life replacement spark plug for compatible gasoline engines. It’s well suited to anyone performing a full-plug service, keeping spare plugs for fleet maintenance, or upgrading to a finer-electrode iridium option for more consistent ignition performance.\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: Does this pack include six plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the NGK LTR6IX-11 (model 6509) is sold as a pack of six spark plugs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How do I confirm fitment for my vehicle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check your owner's manual or parts lookup for LTR6IX-11 specifications, including thread size, reach and heat range.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":55170162229591,"sku":"B00J62NNAC","price":64.03,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/ngk-pack-front.jpg?v=1790424386","url":"https:\/\/britishgarage.co.uk\/products\/ngk-iridium-spark-plugs-ltr6ix-11-6-pack-fine-iridium-tip-for-long-life-and-stable-ignition","provider":"British Garage","version":"1.0","type":"link"}