{"product_id":"ngk-iridium-ix-spark-plugs-tr55ix-7164-8-pack-iridium-tip-oem-grade-durability","title":"NGK Iridium IX Spark Plugs TR55IX (7164) 8-Pack — Iridium Tip, OEM-Grade Durability","description":"\u003cp\u003e\u003cstrong\u003eNGK 7164 Iridium IX TR55IX spark plugs (8-pack) are high-durability, OEM-grade ignition plugs designed to deliver consistent spark performance and long service life for compatible engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese NGK Iridium IX spark plugs are commonly used as original-equipment replacements and engineered to balance reliable ignition, extended longevity and steady performance under everyday driving conditions. NGK is a global leader in spark plug manufacturing, and the TR55IX (part number 7164) brings a fine iridium-tipped center electrode and robust construction intended to meet factory specifications. Before ordering, verify fitment on NGK's application guide to confirm compatibility with your engine, drivetrain and required quantity.\u003c\/p\u003e\n\n\u003ch3\u003eWill these plugs fit my vehicle?\u003c\/h3\u003e\n\u003cp\u003eCompatibility depends on your vehicle's engine design and the manufacturer's recommended plug specifications. NGK maintains an online application database where you can look up the TR55IX (7164) by make, model and year to confirm fitment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCheck NGK's official application tool for exact fitment details.\u003c\/li\u003e\n  \u003cli\u003eConfirm required plug gap and torque specs in your service manual.\u003c\/li\u003e\n  \u003cli\u003eThis listing contains eight plugs—match quantity to your engine's cylinder count.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do Iridium IX plugs affect performance and durability?\u003c\/h3\u003e\n\u003cp\u003eIridium center electrodes are harder and finer than traditional alloys, producing a more concentrated spark and resisting wear longer. That typically translates to steadier combustion and extended service intervals under normal operating conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFine iridium tip for focused, reliable spark.\u003c\/li\u003e\n  \u003cli\u003eDurable construction reduces electrode erosion over time.\u003c\/li\u003e\n  \u003cli\u003eDesigned to match OEM ignition characteristics and keep emissions and drivability consistent.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I expect during installation and maintenance?\u003c\/h3\u003e\n\u003cp\u003eInstallation follows standard spark plug procedures: verify gap, hand-start threads to avoid cross-threading, then torque to spec. Regular inspection and replacement intervals depend on driving conditions but are generally longer than conventional plugs due to the iridium electrode.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm factory gap if pre-gapped—adjust only if necessary.\u003c\/li\u003e\n  \u003cli\u003eUse proper torque and anti-seize guidance from the vehicle manual.\u003c\/li\u003e\n  \u003cli\u003eReplace in matched sets to maintain balanced ignition across cylinders.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these OEM-quality plugs worth the price?\u003c\/h3\u003e\n\u003cp\u003eNGK's reputation as the world's leading OEM spark plug supplier reflects consistent quality control and engineering, so many buyers find the Iridium IX series to be a cost-effective way to match factory performance while extending plug life. Value will depend on your vehicle and how long you expect between service intervals.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOften specified as original equipment by manufacturers.\u003c\/li\u003e\n  \u003cli\u003eEngineered for reliable starts and consistent combustion.\u003c\/li\u003e\n  \u003cli\u003eEight-plug packaging suits four-, six- and eight-cylinder engine applications where applicable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The NGK 7164 Iridium IX TR55IX (8-pack) is suited for vehicle owners and technicians who want OEM-level replacement plugs with enhanced wear resistance and steady ignition performance. Choose these plugs if your vehicle's application list includes the TR55IX, you prefer long-life iridium electrodes, and you want a full set to service multiple cylinders at once. Always verify compatibility for your specific engine and follow manufacturer torque and gap specifications during installation.\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 many spark plugs are included in this listing?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This listing contains eight NGK TR55IX (7164) iridium spark plugs, suitable for engines requiring eight plugs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these plugs come pre-gapped?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They may be pre-gapped to NGK standards; always verify and adjust the gap to your vehicle's specification before installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48084154351774,"sku":"B0033I4W6E","price":98.68,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-front-packaging_ba73718e-22fb-44e9-bd90-d0a0bcc6779b.jpg?v=1785847586","url":"https:\/\/northtrailauto.ca\/products\/ngk-iridium-ix-spark-plugs-tr55ix-7164-8-pack-iridium-tip-oem-grade-durability","provider":"North Trail Auto","version":"1.0","type":"link"}