{"product_id":"ngk-iridium-spark-plugs-ltr6ix-11-6-pack-long-life-precision-fit","title":"NGK Iridium Spark Plugs LTR6IX-11 6-Pack — Long-Life, Precision Fit","description":"\u003cstrong\u003eNGK #6509 LTR6IX-11 iridium spark plugs are precision-engineered ignition components sold as a pack of six for reliable, long-life performance.\u003c\/strong\u003e\n\n\u003cp\u003eThese NGK iridium plugs combine a fine iridium center electrode and robust construction to deliver consistent spark, improved throttle response, and extended service intervals compared with standard plugs. Designed for a range of petrol engines, the LTR6IX-11 model is sized and gapped to factory specifications so it can replace OEM units or serve as a high-quality upgrade.\u003c\/p\u003e\n\n\u003ch3\u003eWhat makes the LTR6IX-11 different from conventional spark plugs?\u003c\/h3\u003e\n\u003cp\u003eThe iridium-tipped center electrode is significantly harder and finer than conventional nickel electrodes, which lowers voltage requirements and produces a more concentrated spark. This design improves durability and helps preserve ignition performance over many miles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFine iridium center electrode for a concentrated spark\u003c\/li\u003e\n  \u003cli\u003eDurable construction resists wear and erosion\u003c\/li\u003e\n  \u003cli\u003eManufactured to NGK tolerances for consistent fit and function\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does buying a 6-piece pack benefit me?\u003c\/h3\u003e\n\u003cp\u003ePurchasing the NGK #6509 as a six-pack ensures you have a complete set for a typical four- or six-cylinder engine plus spares for future replacement. Bulk packs reduce per-plug cost and eliminate mismatched wear when replacing plugs in the same engine.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete set for 4–6 cylinder engines or one full replacement cycle for some vehicles\u003c\/li\u003e\n  \u003cli\u003eCost-effective versus single-plug purchases\u003c\/li\u003e\n  \u003cli\u003eUniform performance across all cylinders when installed together\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these plugs compatible with my vehicle, and how do I check fitment?\u003c\/h3\u003e\n\u003cp\u003eCompatibility depends on your engine’s thread size, reach, and heat range. Confirm LTR6IX-11 matches your vehicle by checking the owner’s manual, NGK part cross-reference, or an online parts lookup before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify thread diameter and reach against OEM specifications\u003c\/li\u003e\n  \u003cli\u003eCheck heat range suitability for your engine and driving style\u003c\/li\u003e\n  \u003cli\u003eUse NGK cross-reference tools or consult a trusted mechanic if uncertain\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I install and maintain NGK iridium spark plugs?\u003c\/h3\u003e\n\u003cp\u003eInstall new plugs with the proper torque value and clean threads to avoid seizing. Re-check gap only if necessary and inspect plug condition at recommended service intervals; iridium plugs typically last longer but still benefit from periodic inspection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eApply thread lubricant or anti-seize only if recommended by NGK\u003c\/li\u003e\n  \u003cli\u003eTighten to the vehicle manufacturer’s torque spec to prevent damage\u003c\/li\u003e\n  \u003cli\u003eInspect heat deposits and electrode wear during scheduled maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: NGK #6509 LTR6IX-11 iridium spark plugs are aimed at vehicle owners and mechanics seeking a long-lasting, precision ignition option for compatible petrol engines. They suit drivers who want consistent throttle response, reduced ignition wear, and the convenience of replacing plugs in matched sets. Ideal for routine maintenance, performance-focused tune-ups, or when upgrading from standard plugs to iridium technology.\u003c\/p\u003e\n\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How many plugs come in this NGK package?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This listing contains six NGK LTR6IX-11 iridium spark plugs, sold together as a pack.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these plugs need a special gap adjustment?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They are factory-gapped to NGK specifications; check vehicle requirements and adjust only if necessary.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48079827239070,"sku":"B00J62NNAC","price":73.25,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-iridium-ltr6ix-11-front-packing.jpg?v=1785771915","url":"https:\/\/northtrailauto.ca\/products\/ngk-iridium-spark-plugs-ltr6ix-11-6-pack-long-life-precision-fit","provider":"North Trail Auto","version":"1.0","type":"link"}