{"product_id":"ngk-6597-spark-plug-exhaust-side","title":"NGK 6597 Spark Plug - Exhaust Side","description":"\u003ch2\u003eNGK Iridium IX Spark Plug 6597 Overview\u003c\/h2\u003e\u003cp\u003eThe NGK Iridium IX Spark Plug 6597 is engineered for reliable ignition performance across a wide range of vehicles including Audi, BMW, Toyota, and Mercedes-Benz models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine responsiveness.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIridium center electrode tip for enhanced durability and ignition\u003c\/li\u003e\n\u003cli\u003eTaper cut ground electrode tip design for improved spark exposure\u003c\/li\u003e\n\u003cli\u003eCopper core center electrode for optimal conductivity\u003c\/li\u003e\n\u003cli\u003eStandard ground configuration with a single nickel ground electrode\u003c\/li\u003e\n\u003cli\u003eRemovable nut electrical terminal type for flexible installation\u003c\/li\u003e\n\u003cli\u003ePre-gap size of 0.032 inches for precise spark gap\u003c\/li\u003e\n\u003cli\u003eFlat seat type with 14mm thread diameter and 0.75 inch reach\u003c\/li\u003e\n\u003cli\u003eHex size of 13\/16 inch for standard wrench compatibility\u003c\/li\u003e\n\u003cli\u003eManufacturer heat range rating of 5 for balanced heat dissipation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eIridium IX Spark Plug Product Line Details\u003c\/h2\u003e\u003cp\u003eThe Iridium IX Spark Plug line by NGK is designed to provide enhanced ignition performance and longer service life compared to conventional spark plugs. Featuring an iridium center electrode tip, these plugs offer improved wear resistance and stable spark delivery, which is critical for vehicles such as the BMW 320i, Toyota 4Runner, and Mercedes-Benz 380SEL. The 6597 part number belongs to this line, ensuring consistent quality and fitment for compatible secondary ignition systems.\u003c\/p\u003e\u003ch2\u003eTechnical Description and Specifications\u003c\/h2\u003e\u003cp\u003eThis NGK spark plug incorporates a copper core center electrode to maximize electrical and thermal conductivity, paired with an iridium tip that resists erosion and maintains a sharp spark point. The taper cut ground electrode tip design enhances spark exposure, contributing to more efficient combustion. The single nickel ground electrode provides a standard ground configuration, while the removable nut electrical terminal type allows for easier connection adjustments. With a pre-gap size of 0.032 inches and a flat seat type, the plug fits securely in engines requiring a 14mm thread diameter and 0.75 inch reach. The heat range of 5 balances heat dissipation to prevent fouling or overheating in various driving conditions.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Audi 200SX and Volkswagen Rabbit Convertible models\u003c\/li\u003e\n\u003cli\u003eSuitable for BMW 318i, 320i, 528i, and 535i engines\u003c\/li\u003e\n\u003cli\u003eFits Toyota 4Runner, Celica, and Land Cruiser vehicles\u003c\/li\u003e\n\u003cli\u003eApplicable for Mercedes-Benz 380SE, 380SEL, and 560SEL series\u003c\/li\u003e\n\u003cli\u003eWorks with Nissan Pathfinder and Mitsubishi Mirage among others\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by NGK 6597 Spark Plug\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMisfiring or rough idling due to worn or fouled spark plugs\u003c\/li\u003e\n\u003cli\u003eReduced fuel efficiency from incomplete combustion\u003c\/li\u003e\n\u003cli\u003eDifficulty starting engines in cold or variable conditions\u003c\/li\u003e\n\u003cli\u003eEngine hesitation or loss of power under acceleration\u003c\/li\u003e\n\u003cli\u003eExcessive emissions caused by inefficient ignition\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eEnsure the spark plug gap is set to the specified 0.032 inches before installation. Use a 13\/16 inch socket wrench to tighten the plug to the manufacturer’s torque specifications. The flat seat design requires proper seating to avoid compression leaks. The removable nut terminal allows for flexible electrical connections, but verify secure attachment to prevent ignition issues. Always inspect the spark plug threads and clean the cylinder head before installation to ensure proper fitment.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNGK spark plugs, including the Iridium IX 6597, are manufactured to meet strict quality standards for durability and performance. The use of premium materials such as iridium and copper ensures long service life and consistent ignition. While specific warranty details are not provided here, NGK products typically come with manufacturer-backed quality assurance to support reliable operation in compatible vehicles.\u003c\/p\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":52238166753461,"sku":"BCDP-6597","price":15.39,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NG_6597_Fro.jpg?v=1775665012","url":"https:\/\/www.partcatalog.com\/products\/ngk-6597-spark-plug-exhaust-side","provider":"PartCatalog","version":"1.0","type":"link"}