{"product_id":"ngk-tr55ix-iridium-spark-plug-stock-number-7164-5-8-inch-hex-14mm-thread","title":"NGK TR55IX Iridium Spark Plug, Stock Number 7164, 5\/8 Inch Hex, 14mm Thread","description":"\u003cp\u003eThe NGK TR55IX (NGK stock number 7164) is an iridium-tip spark plug built on NGK's proven standard-plug platform. It pairs a solid copper core, prized for superior heat dissipation, conductivity, and a broad heat range, with an iridium center electrode tip for durable, consistent ignition. The ground electrode uses a standard configuration with a nickel core, and the plug body is treated with corrosion-resistant plating that keeps installation and removal easy over the plug's service life.\u003c\/p\u003e\u003cp\u003eThe TR55IX carries a 5k ohm resistor to help suppress ignition noise, a 5\/8 inch hex size for standard socket fitment, and a 14mm thread. It is built as an OE-cornerstone design, reflecting NGK's decades of manufacturing reliable ignition components. Always check your engine and maintenance manual to confirm this is the correct plug for your application, and only install a spark plug as recommended by your engine's original equipment manufacturer, since using the wrong plug can reduce performance and fuel economy or damage the engine.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e NGK\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e TR55IX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNGK Stock Number:\u003c\/strong\u003e 7164\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter Electrode Tip Material:\u003c\/strong\u003e Iridium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter Electrode Core Material:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround Electrode Core Material:\u003c\/strong\u003e Nickel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround Configuration:\u003c\/strong\u003e Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResistance:\u003c\/strong\u003e 5k ohm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex Size:\u003c\/strong\u003e 5\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 14mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.15 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 087295171646\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e73918041131\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the NGK TR55IX spark plug (part number 7164) made of?\u003c\/strong\u003e The TR55IX has a solid copper core center electrode with an iridium tip, paired with a nickel-core ground electrode, and the plug body is treated with corrosion-resistant plating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the NGK TR55IX an iridium spark plug?\u003c\/strong\u003e Yes, the center electrode tip on the NGK TR55IX (stock number 7164) is iridium, while the ground electrode core is nickel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat hex size does the NGK TR55IX (7164) use?\u003c\/strong\u003e The hex size is 5\/8 inch, the standard socket size for this NGK spark plug.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size is the NGK 7164 spark plug?\u003c\/strong\u003e It has a 14mm thread size.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the electrical resistance rating of this spark plug?\u003c\/strong\u003e The NGK TR55IX carries a 5k ohm resistor to help suppress ignition noise.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the NGK TR55IX (7164) spark plug weigh?\u003c\/strong\u003e This spark plug weighs 0.15 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is printed on the NGK TR55IX spark plug packaging?\u003c\/strong\u003e The UPC for NGK part number TR55IX (stock 7164) is 087295171646.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat ground electrode configuration does the TR55IX use?\u003c\/strong\u003e It uses a standard ground electrode configuration with a nickel core.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the NGK TR55IX cross-reference to any other part number?\u003c\/strong\u003e Yes, the NGK TR55IX (7164) interchanges with part number 73918041131.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the NGK TR55IX a genuine NGK spark plug or an aftermarket copy?\u003c\/strong\u003e It is a genuine NGK product, built on NGK's OE-cornerstone standard plug design with an iridium tip added for durability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many spark plugs come in one package of the NGK 7164?\u003c\/strong\u003e The NGK TR55IX ships as a single spark plug, one per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the tip material and the ground electrode material on this plug?\u003c\/strong\u003e On the NGK TR55IX, the center electrode tip is iridium for durability and consistent ignitability, while the ground electrode core is nickel.\u003c\/p\u003e","brand":"NGK Spark Plugs","offers":[{"title":"Default Title","offer_id":49028254925019,"sku":"NGK-TR55IX","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/NGK-TR55IX-Spark-Plug__77342.1722487087.500.750.jpg?v=1785165243","url":"https:\/\/www.goodvibesmarina.com\/products\/ngk-tr55ix-iridium-spark-plug-stock-number-7164-5-8-inch-hex-14mm-thread","provider":"Good Vibes Marina","version":"1.0","type":"link"}