{"product_id":"denso-iridium-long-life-spark-plugs-sc20hr11-3444-4-pack-iridium-tip-direct-fit-replacement","title":"Denso Iridium Long Life Spark Plugs SC20HR11 (3444) 4-Pack — Iridium Tip, Direct-Fit Replacement","description":"\u003cstrong\u003eDENSO SC20HR11 Iridium Long Life spark plugs are a genuine four-piece replacement set designed to restore reliable ignition and long-lasting performance.\u003c\/strong\u003e\n\n\u003cp\u003eThese DENSO 3444 (SC20HR11) spark plugs arrive as a 4-pack of original equipment replacement parts, built with iridium-tipped electrodes for improved durability and stable combustion. Supplied in manufacturer packaging with the correct hardware, they’re intended as a direct-fit replacement for compatible vehicles — verify compatibility with your vehicle’s fitment tool before installation.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these iridium spark plugs improve engine reliability?\u003c\/h3\u003e\n\u003cp\u003eThe SC20HR11 uses a fine iridium center electrode that resists wear better than conventional materials, helping sustain a sharp spark over many miles. Stable ignition reduces misfires and supports smoother idle and throttle response without changing your engine’s setup.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIridium-tipped center electrode for extended life\u003c\/li\u003e\n  \u003cli\u003ePrecise electrode geometry for consistent spark delivery\u003c\/li\u003e\n  \u003cli\u003eDurability that helps maintain performance between service intervals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the package and is this a direct replacement?\u003c\/h3\u003e\n\u003cp\u003eThis listing includes four genuine DENSO spark plugs (part number 3444 \/ SC20HR11) in original packaging, plus any supplied hardware. They are designed as direct replacements; still check make, model, year, and engine code to confirm fitment for your specific vehicle.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFour DENSO SC20HR11 spark plugs in manufacturer packaging\u003c\/li\u003e\n  \u003cli\u003eOriginal hardware included where applicable\u003c\/li\u003e\n  \u003cli\u003eDirect replacement part — verify fit with vehicle compatibility tool\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I install and maintain these spark plugs?\u003c\/h3\u003e\n\u003cp\u003eInstall DENSO spark plugs using the correct torque settings from your vehicle manufacturer and apply anti-seize only if recommended for your engine. Inspect ignition components periodically and replace plugs according to your vehicle’s maintenance schedule or sooner if performance issues arise.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse manufacturer-specified torque to avoid overtightening\u003c\/li\u003e\n  \u003cli\u003eReplace per vehicle maintenance intervals or when signs of wear appear\u003c\/li\u003e\n  \u003cli\u003eFollow OEM guidance on anti-seize and gap settings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these spark plugs suitable for performance or daily driving?\u003c\/h3\u003e\n\u003cp\u003eDenso iridium plugs balance longevity and consistent spark quality, making them suitable for everyday commuting as well as spirited driving where reliable ignition matters. They do not require engine modification and are intended to match original equipment specifications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIdeal for daily-driven vehicles and spirited use\u003c\/li\u003e\n  \u003cli\u003eNo vehicle modification required — direct OE-style fit\u003c\/li\u003e\n  \u003cli\u003eHelps maintain factory performance characteristics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Mechanics, DIY car owners, and fleet managers seeking a genuine OEM-quality replacement plug will find the DENSO SC20HR11 (3444) 4-pack a practical choice. If you need long-lasting ignition components that match factory specifications and prefer genuine DENSO parts, this set provides a straightforward, compatible solution — just confirm vehicle fitment 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: Is the DENSO SC20HR11 a direct replacement for my vehicle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This is a direct-fit DENSO part in many applications; confirm exact fitment using your vehicle make, model, year, and engine code before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long do iridium spark plugs like SC20HR11 typically last?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Iridium plugs generally last significantly longer than copper plugs; follow your vehicle’s maintenance schedule and inspect for wear periodically.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Denso","offers":[{"title":"Default Title","offer_id":48084151632030,"sku":"B00MYO7HE2","price":78.8,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/denso-iridium-spark-plug-front-packaging.jpg?v=1785847479","url":"https:\/\/northtrailauto.ca\/products\/denso-iridium-long-life-spark-plugs-sc20hr11-3444-4-pack-iridium-tip-direct-fit-replacement","provider":"North Trail Auto","version":"1.0","type":"link"}