{"product_id":"ngk-ilzkr7b-11s-iridium-spark-plugs-4-pack-box-of-4-laser-welded-platinum-backed-for-long-life","title":"NGK ILZKR7B-11S Iridium Spark Plugs 4-Pack (Box of 4) — Laser-Welded, Platinum-Backed for Long Life","description":"\u003cstrong\u003eNGK ILZKR7B-11S laser-welded iridium spark plugs are high-durability ignition components designed to deliver stronger sparks, longer service life, and more consistent engine performance.\u003c\/strong\u003e\n\n\u003cp\u003eThis four-pack of NGK (5787-4PK) ILZKR7B-11S spark plugs combines an ultra-thin iridium center electrode with a platinum-backed ground electrode and advanced insulator design to reduce wear, resist corrosion, and maintain reliable ignitability over many miles. Engineered to limit carbon build-up and prevent flashover, these plugs are aimed at drivers and technicians who want improved starts, smoother idling, and better overall combustion stability without frequent replacements.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these NGK spark plugs improve ignition and throttle response?\u003c\/h3\u003e\n\u003cp\u003eThe laser-welded iridium tip concentrates the spark on a very small surface area, creating a more energetic and consistent ignition event. That sharper spark helps fuel-air mixtures ignite more completely, which commonly translates to quicker acceleration and more reliable cold starts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLaser-welded iridium center electrode for concentrated spark energy\u003c\/li\u003e\n  \u003cli\u003ePlatinum disc welded to ground electrode for stable spark gap over time\u003c\/li\u003e\n  \u003cli\u003eSmaller tip diameter for improved ignitability and consistent flame kernel formation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat design features extend service life and prevent fouling?\u003c\/h3\u003e\n\u003cp\u003eNGK combines durable materials with an insulator and sealing strategy that reduce deposits and prevent combustion gases from affecting the plug. Corrugated ribs, a longer insulator nose, and a triple gasket seal all work together to reduce flashover and carbonization that commonly shorten plug life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIridium and platinum contact surfaces resist wear and preserve gap geometry\u003c\/li\u003e\n  \u003cli\u003eLonger insulator nose reduces carbon buildup near the electrodes\u003c\/li\u003e\n  \u003cli\u003eCorrugated ribs on the ceramic insulator minimize flashover risk\u003c\/li\u003e\n  \u003cli\u003eTriple gasket seal prevents combustion gas leakage and preserves performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these plugs resist corrosion and seizing in the cylinder head?\u003c\/h3\u003e\n\u003cp\u003eYes — the plugs use trivalent metal plating on the shell to reduce corrosion and anti-seize issues, making removal and reinstallation easier at service intervals. This protective plating helps maintain thread condition and prevents the common problem of frozen plugs in harsh environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTrivalent metal plating for anti-corrosion and anti-seize protection\u003c\/li\u003e\n  \u003cli\u003eDurable shell finish reduces thread damage during service\u003c\/li\u003e\n  \u003cli\u003eDesign intended for repeated service without accelerated degradation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these spark plugs affect fuel economy and emissions?\u003c\/h3\u003e\n\u003cp\u003eBy improving ignition consistency and reducing misfires, NGK iridium plugs can help the engine burn fuel more completely. While individual results vary by vehicle and driving conditions, better combustion efficiency often results in modest gains in fuel economy and reduced unburned hydrocarbons.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSharper, more reliable sparks promote complete combustion\u003c\/li\u003e\n  \u003cli\u003eReduced misfires can lower unburned fuel and tailpipe emissions\u003c\/li\u003e\n  \u003cli\u003eStable gap retention helps maintain efficiency between services\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Drivers, mechanics, and fleet operators who want a long-lasting, high-performance spark plug that improves ignition reliability and reduces maintenance frequency. This NGK ILZKR7B-11S four-pack is well suited for vehicles specified to use iridium\/platinum-type plugs and for anyone seeking a durable OEM-quality replacement that balances longevity, corrosion resistance, and ignition performance.\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 NGK ILZKR7B-11S spark plugs be replaced?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replacement intervals depend on vehicle and driving conditions; iridium plugs commonly last 60,000–100,000 miles under normal use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these NGK plugs compatible with my car?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check your owner's manual or NGK part lookup for ILZKR7B-11S compatibility with your engine and gap specifications.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48081043587230,"sku":"B01DMFGRZG","price":76.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-box-front-ilzkr7b-11s.jpg?v=1785795346","url":"https:\/\/northtrailauto.ca\/products\/ngk-ilzkr7b-11s-iridium-spark-plugs-4-pack-box-of-4-laser-welded-platinum-backed-for-long-life","provider":"North Trail Auto","version":"1.0","type":"link"}