{"product_id":"denso-iridium-long-life-spark-plugs-sc16hr11-4-pack-0-7mm-tip-laser-welded-for-better-ignition","title":"Denso Iridium Long-Life Spark Plugs SC16HR11 4-Pack — 0.7mm Tip, Laser-Welded for Better Ignition","description":"\u003cb\u003eDenso SC16HR11 Iridium Long-Life Spark Plugs are high-ignitability replacement plugs built with a 0.7mm iridium-tipped center electrode for longer life and improved ignition performance.\u003c\/b\u003e\n\n\u003cp\u003eThese SC16HR11 plugs use Denso's patented iridium alloy and laser-welded construction—a design derived from their Iridium Power line and factory-installed in many luxury and passenger vehicles. The combination of a fine iridium center electrode, copper core for heat transfer, and a five-rib insulator reduces misfires, flashover, and voltage loss while extending service intervals versus conventional plugs.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these spark plugs improve starting and throttle response?\u003c\/h3\u003e\n\u003cp\u003eThe smaller 0.7mm iridium center electrode produces a more concentrated spark, which promotes more complete combustion and crisper throttle response. That focused spark helps ignite the fuel-air mixture faster across a wider range of engine speeds.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e0.7mm iridium tip for concentrated spark\u003c\/li\u003e\n  \u003cli\u003eCopper core center electrode for consistent heat dissipation\u003c\/li\u003e\n  \u003cli\u003eLaser-welded electrode bond for reliable spark delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes Denso’s design longer lasting than conventional plugs?\u003c\/h3\u003e\n\u003cp\u003eDenso pairs a durable iridium alloy tip with a robust copper core and strong sealing to resist erosion and maintain consistent gap geometry. The materials and manufacturing process reduce wear so the plug sustains performance over extended mileage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePatented iridium alloy resists electrode degradation\u003c\/li\u003e\n  \u003cli\u003eDual copper and glass seal creates a gas-tight assembly\u003c\/li\u003e\n  \u003cli\u003eFactory-grade laser welding secures the iridium tip for durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these fit my vehicle and are they prepped for installation?\u003c\/h3\u003e\n\u003cp\u003eThe SC16HR11 is an application-specific part commonly used by OEMs—verify fitment against your vehicle’s required part number. Each plug is 100% pre-fired and inspected to ensure consistent operation right out of the box.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCheck vehicle compatibility with OEM cross-reference\u003c\/li\u003e\n  \u003cli\u003e100% pre-fired for reliable initial performance\u003c\/li\u003e\n  \u003cli\u003eFactory-quality construction consistent with OEM standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the insulator and sealing affect reliability?\u003c\/h3\u003e\n\u003cp\u003eDenso’s unique five-rib insulator reduces the chance of flashover (unwanted arcing) along the ceramic surface, and the dual copper-and-glass seal secures the electrode to the insulator for a gas-tight fit. Together these features reduce misfires and preserve combustion stability over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFive-rib insulator minimizes flashover and voltage loss\u003c\/li\u003e\n  \u003cli\u003eDual copper\/glass seal ensures gas-tight electrode assembly\u003c\/li\u003e\n  \u003cli\u003eConsistent gap retention helps maintain combustion stability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho is this for?\u003c\/strong\u003e The Denso SC16HR11 Iridium Long-Life Spark Plugs suit drivers and technicians who want an OEM-grade replacement that emphasizes durability and reliable ignition: ideal for owners of vehicles specifying SC16HR11 or compatible numbers, performance-minded commuters seeking longer service intervals, and shops supplying premium replacement components. Always confirm compatibility with your vehicle’s service manual or parts database before purchase.\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 Denso SC16HR11 iridium plugs last?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They typically last significantly longer than conventional plugs—often up to three times the life—depending on driving conditions and engine tune.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these plugs direct OEM replacements?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, SC16HR11 is an OEM-style part used by several manufacturers, but always confirm fitment with your vehicle’s part number.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Denso","offers":[{"title":"Default Title","offer_id":55171455779159,"sku":"B083NJKY3Z","price":75.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/denso-sc16hr11-front-packaging.jpg?v=1790446071","url":"https:\/\/britishgarage.co.uk\/products\/denso-iridium-long-life-spark-plugs-sc16hr11-4-pack-0-7mm-tip-laser-welded-for-better-ignition","provider":"British Garage","version":"1.0","type":"link"}