{"product_id":"ngk-iridium-ix-spark-plug-lfr7aix-pk4-iridium-tip-copper-core-for-long-life","title":"NGK Iridium IX Spark Plug LFR7AIX PK4 — Iridium Tip, Copper Core for Long Life","description":"\u003cp\u003e\u003cstrong\u003eNGK Iridium IX LFR7AIX (2309) is a premium iridium-tipped spark plug engineered for reliable ignition, extended service life, and consistent combustion performance.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis genuine NGK replacement plug (MPN LFR7AIX, #2309) is built to meet or exceed original equipment specifications. It combines a fine iridium center electrode with a copper core and durable ceramic insulator to deliver stable firing, controlled heat transfer, and resistance to corrosion and seizing. Ideal for drivers and technicians who want long-lasting, dependable ignition components, this PK4 package contains four identical plugs ready for installation.\u003c\/p\u003e\n\n\u003ch3\u003eWhat makes the Iridium IX LFR7AIX different from standard plugs?\u003c\/h3\u003e\n\n\u003cp\u003eThe Iridium IX design centers on a very fine iridium alloy tip that reduces voltage requirements for spark formation and improves electrode longevity. NGK pairs this with a copper core to help dissipate heat and a premium ceramic insulator for mechanical strength and thermal stability. The result is a plug that maintains consistent gap and performance over many miles.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIridium center electrode for low-voltage, long-life ignition\u003c\/li\u003e\n  \u003cli\u003eCopper core to enhance heat transfer from the firing end\u003c\/li\u003e\n  \u003cli\u003ePure alumina silicate ceramic insulator for strength and thermal control\u003c\/li\u003e\n  \u003cli\u003eTrivalent metal plating on the threads to resist corrosion and seizing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this plug resist misfires and unwanted current paths?\u003c\/h3\u003e\n\n\u003cp\u003eNGK addresses flashover and stray current with design and materials that preserve a clean firing path. Corrugated ribs on the insulator surface interrupt surface leakage under high-voltage conditions, while the precise electrode geometry helps produce a focused, stable spark at each ignition event.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCorrugated insulator ribs reduce surface flashover\u003c\/li\u003e\n  \u003cli\u003ePrecise electrode geometry promotes repeatable spark location\u003c\/li\u003e\n  \u003cli\u003eQuality manufacturing tolerances minimize misfire risk\u003c\/li\u003e\n  \u003cli\u003eConsistent gap retention supports stable combustion\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat protective features improve installation and long-term service?\u003c\/h3\u003e\n\n\u003cp\u003eLFR7AIX plugs include several corrosion-resistant and assembly-friendly features to make installation easier and to reduce service headaches. The trivalent metal plating on the threaded portion prevents rust and seizing in the cylinder head, while NGK’s manufacturing standards ensure consistent thread fit and torque behavior.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTrivalent plating provides anti-corrosion and anti-seize protection\u003c\/li\u003e\n  \u003cli\u003eStandard thread dimensions for reliable fit and torque control\u003c\/li\u003e\n  \u003cli\u003eCopper core removes heat efficiently to avoid overheating the plug\u003c\/li\u003e\n  \u003cli\u003eRobust insulator minimizes the chance of cracking during installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will these plugs affect maintenance intervals and parts replacement?\u003c\/h3\u003e\n\n\u003cp\u003eBecause of the iridium-tipped electrode and durable construction, these plugs generally last longer than conventional nickel-plated plugs, which can extend replacement intervals under normal driving conditions. Real-world life depends on engine type, driving habits, and tune, but many users report significantly improved longevity and steady performance across service intervals.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIridium tip extends electrode life compared with nickel tips\u003c\/li\u003e\n  \u003cli\u003eCopper core and ceramic insulator support stable operating temperatures\u003c\/li\u003e\n  \u003cli\u003eDurable plating helps preserve threads for cleaner future removal\u003c\/li\u003e\n  \u003cli\u003ePK4 pack supplies four plugs for multi-cylinder tune-ups or spares\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers, mechanics, and performance-minded enthusiasts who need a direct-fit, long-life ignition plug that respects OE specs and improves service reliability. The NGK LFR7AIX (2309) suits a wide range of gasoline engines where this specific heat range and thread size are required and is particularly useful for anyone wanting fewer spark plug changes and steady combustion performance over time.\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 the LFR7AIX compatible with my engine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check your vehicle’s owner manual or parts guide for NGK LFR7AIX (2309) compatibility and thread\/gap specifications before buying.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I replace these iridium plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replacement intervals vary; many drivers see extended life versus standard plugs, often lasting tens of thousands of miles depending on usage.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":55168477888855,"sku":"B003RYMPUY","price":50.15,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/ngk-iridium-ix-lfr7aix-front-packaging.jpg?v=1790405029","url":"https:\/\/britishgarage.co.uk\/products\/ngk-iridium-ix-spark-plug-lfr7aix-pk4-iridium-tip-copper-core-for-long-life","provider":"British Garage","version":"1.0","type":"link"}