{"product_id":"ngk-iridium-spark-plugs-ilzkr7b-11s-box-of-4-laser-iridium-with-platinum-ground","title":"NGK Iridium Spark Plugs ILZKR7B-11S Box of 4 — Laser Iridium with Platinum Ground","description":"\u003cstrong\u003eNGK ILZKR7B-11S Laser Iridium spark plugs are premium ignition parts with an ultra-fine iridium tip and platinum backing designed to deliver durable, consistent sparks and long service life.\u003c\/strong\u003e\n\n\u003cp\u003eThis four-pack of NGK (5787-4PK) ILZKR7B-11S spark plugs combines a laser-welded iridium center electrode and a platinum ground electrode disc to minimize wear while maintaining reliable ignition performance. Engineered features such as an extended insulator nose, corrugated insulator ribs, and a triple gasket seal reduce fouling and gas leakage, helping engines start quickly and run smoothly over many miles.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these spark plugs improve starting and throttle response?\u003c\/h3\u003e\n\u003cp\u003eThe ultra-thin iridium center tip concentrates the spark energy, creating a more efficient ignition event that helps the engine start faster and respond more quickly to throttle inputs. The enhanced spark consistency also supports steadier idle and smoother acceleration under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLaser-welded iridium tip for a concentrated, reliable spark\u003c\/li\u003e\n  \u003cli\u003ePlatinum disc on ground electrode for stable long-term performance\u003c\/li\u003e\n  \u003cli\u003eFaster cold starts and improved throttle feel thanks to stronger ignition\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat construction features extend the life of these plugs?\u003c\/h3\u003e\n\u003cp\u003eNGK combines iridium and platinum materials and precision welding to resist electrode erosion and maintain gap integrity over time. The longer insulator nose resists carbon buildup while corrugated ribs and a triple gasket seal protect against flashover and combustion gas leakage—both factors that accelerate plug wear.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIridium center electrode resists wear, preserving gap geometry\u003c\/li\u003e\n  \u003cli\u003ePlatinum backing on ground electrode reduces deterioration\u003c\/li\u003e\n  \u003cli\u003eCorrugated insulator ribs and triple gasket prevent flashover and leaks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these plugs help improve fuel efficiency and emissions?\u003c\/h3\u003e\n\u003cp\u003eBy producing a stronger, more consistent spark, these plugs can help the air-fuel mixture burn more completely, which often results in marginal gains in fuel economy and lower unburned hydrocarbons. While gains depend on vehicle condition and driving habits, the spark plug design targets stable combustion across operating ranges.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMore complete combustion from concentrated spark energy\u003c\/li\u003e\n  \u003cli\u003eReduced misfires and smoother idle lower wasted fuel\u003c\/li\u003e\n  \u003cli\u003eTrivalent metal plating helps prevent corrosion and seizing for reliable replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I know if ILZKR7B-11S is the right fit for my vehicle?\u003c\/h3\u003e\n\u003cp\u003eCheck your vehicle manufacturer’s recommended part number, gap specification, and thread size to confirm fitment. NGK’s model code ILZKR7B-11S corresponds to specific engines; using the correct part ensures proper reach, heat range, and thread engagement for safe operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify OEM or service manual part number before purchase\u003c\/li\u003e\n  \u003cli\u003eConfirm electrode gap and thread length match manufacturer specs\u003c\/li\u003e\n  \u003cli\u003eUse a trusted parts lookup or dealer reference for compatibility checks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The NGK ILZKR7B-11S (5787-4PK) box of four is aimed at drivers and technicians who want long-lasting OEM-level ignition performance—especially owners of compatible cars and motorcycles seeking better cold starts, stable idle, and reduced maintenance frequency. It's also suitable for anyone replacing worn plugs with a high-quality, corrosion-resistant option built for modern engines.\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 long do NGK Laser Iridium plugs last?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Lifespan varies by engine and driving, but iridium\/platinum plugs typically last 30,000–60,000+ miles under normal conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I gap these plugs before installation?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: NGK plugs come pre-gapped; only adjust gap if your vehicle’s specification differs, and use the proper tool to avoid damaging the electrode.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":55169180041559,"sku":"B01DMFGRZG","price":66.34,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/ngk-laser-iridium-front-packaging.jpg?v=1790420194","url":"https:\/\/britishgarage.co.uk\/products\/ngk-iridium-spark-plugs-ilzkr7b-11s-box-of-4-laser-iridium-with-platinum-ground","provider":"British Garage","version":"1.0","type":"link"}