{"product_id":"ngk-iridium-ix-spark-plug-lkar6aix-11-4-pack-0-6mm-iridium-tip-extended-insulator-for-improved-ignitability","title":"NGK Iridium IX spark plug LKAR6AIX-11 4-pack — 0.6mm iridium tip, extended insulator for improved ignitability","description":"\u003cp\u003e\u003cstrong\u003eNGK LKAR6AIX-11 Iridium IX spark plugs are high-performance, long-lasting ignition parts engineered for improved ignitability, throttle response, and resistance to fouling.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt for performance-oriented engines, the NGK Iridium IX LKAR6AIX-11 (91187) delivers a fine iridium center electrode and durable construction to sustain a stable spark under demanding conditions. This four-pack supplies an advanced 0.6 mm laser-welded iridium tip, extended insulator nose, and corrosion-resistant plating to help maintain consistent combustion events and minimize misfires over time.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the Iridium IX improve starting and throttle response?\u003c\/h3\u003e\n\u003cp\u003eThe ultra-fine 0.6 mm iridium center electrode concentrates the ignition energy into a smaller point, making sparks easier to create across a wider range of engine conditions. That focused spark helps fuel-air mixtures ignite more reliably, which can translate to crisper throttle response and smoother acceleration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e0.6 mm laser-welded iridium tip for concentrated spark energy\u003c\/li\u003e\n  \u003cli\u003eStable spark under varying load and RPM\u003c\/li\u003e\n  \u003cli\u003eDesigned to reduce hesitation during throttle transitions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat design features reduce fouling and flashover?\u003c\/h3\u003e\n\u003cp\u003eNGK extended the insulator nose and added corrugated ribs to interrupt conductive paths that can cause flashover. A tapered ground electrode and a triple gasket seal further protect the spark gap and combustion chamber from deposits and leakage, helping maintain reliable ignition over longer service intervals.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLonger insulator nose to resist carbon build-up\u003c\/li\u003e\n  \u003cli\u003eCorrugated insulator ribs to prevent flashover along the ceramic\u003c\/li\u003e\n  \u003cli\u003eTriple gasket seal to stop combustion gas leakage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy is iridium used and what does it mean for durability?\u003c\/h3\u003e\n\u003cp\u003eIridium has a very high melting point and excellent wear resistance, so the fine electrode tip resists erosion from the heat and electrical stress in modern engines. The laser-welded connection secures the tiny tip for consistent performance, extending the effective life compared with conventional nickel plugs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh melting point alloy for reduced electrode wear\u003c\/li\u003e\n  \u003cli\u003eLaser welding for secure, long-lasting tip attachment\u003c\/li\u003e\n  \u003cli\u003eLess gap erosion equals longer service life\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the finish and plating help during installation and service?\u003c\/h3\u003e\n\u003cp\u003eNGK applies trivalent metal plating to the shell to guard against corrosion and make removal easier even after long exposure to heat and moisture. The anti-seize quality reduces the risk of thread damage and simplifies maintenance, particularly in high-heat engine compartments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTrivalent metal plating for anti-corrosion protection\u003c\/li\u003e\n  \u003cli\u003eImproved anti-seize properties for easier removal\u003c\/li\u003e\n  \u003cli\u003eHelps preserve thread integrity and serviceability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The NGK LKAR6AIX-11 Iridium IX 4-pack is aimed at drivers and mechanics who want a proven, performance-focused spark plug for naturally aspirated and forced-induction engines that benefit from precise ignition. It suits enthusiasts seeking improved throttle feel and longevity, plus technicians who prefer plugs that resist fouling and are easier to service. Ideal for vehicles specified to use the LKAR6AIX-11 or equivalent NGK reference 91187.\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: How often should I replace NGK Iridium IX plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replace according to your vehicle maker’s schedule; many drivers see extended life versus standard plugs, often beyond 40,000 miles depending on driving and engine conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these plugs compatible with turbocharged engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The LKAR6AIX-11’s iridium tip and durable construction are suitable for many turbocharged and high-performance engines when matched to the correct heat range.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48083163087006,"sku":"B07FP438JV","price":55.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-iridium-ix-front-packaging_8bdda071-f76f-47c9-b2e0-a2ef2ddc2853.jpg?v=1785827236","url":"https:\/\/northtrailauto.ca\/products\/ngk-iridium-ix-spark-plug-lkar6aix-11-4-pack-0-6mm-iridium-tip-extended-insulator-for-improved-ignitability","provider":"North Trail Auto","version":"1.0","type":"link"}