{"product_id":"ngk-spark-plug-br8es-3961-set-of-4-standard-replacement-copper-plugs-pre-gapped","title":"NGK Spark Plug BR8ES (3961) Set of 4 — Standard Replacement Copper Plugs, Pre-gapped","description":"\u003cp\u003e\u003cstrong\u003eNGK BR8ES (3961) spark plugs — a genuine set of four standard replacement plugs engineered for reliable ignition and straightforward installation.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis pack contains four authentic NGK BR8ES (3961) spark plugs supplied in original packaging. Designed as direct-replacement ignition components, these plugs match OEM specifications and are intended for compatibility with vehicles that list BR8ES or part number 3961 in their service guide. They arrive ready to install with the correct gap and hardware confirmation when used with manufacturer fitment guides.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these NGK BR8ES plugs affect engine starting and everyday driving?\u003c\/h3\u003e\n\n\u003cp\u003eReplacing worn plugs with new NGK BR8ES units restores the intended spark delivery, which helps the engine fire consistently during start-up and regular use. While performance depends on the overall ignition system condition, fresh plugs reduce misfires and support steady throttle response.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFour genuine NGK BR8ES (3961) plugs per pack for a complete cylinder set on many small engines.\u003c\/li\u003e\n  \u003cli\u003ePre-set gap and standard heat range for compatible applications.\u003c\/li\u003e\n  \u003cli\u003eDesigned to meet OEM fit and function as a direct replacement part.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these NGK spark plugs easy to install for a home mechanic?\u003c\/h3\u003e\n\n\u003cp\u003eYes, the BR8ES plugs are designed for straightforward installation with common hand tools. Always follow your vehicle’s service manual for torque settings and gap checks to ensure correct installation and long service life.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eStandard thread and reach for direct-fit replacement in specified engines.\u003c\/li\u003e\n  \u003cli\u003eFits usual spark plug sockets and torque wrench settings listed by manufacturers.\u003c\/li\u003e\n  \u003cli\u003eComes in original packaging and includes any manufacturer labeling for part verification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check before buying the NGK BR8ES (3961) set?\u003c\/h3\u003e\n\n\u003cp\u003eConfirm that BR8ES or part number 3961 is listed for your vehicle or engine model; use your owner’s manual or online fitment tools to avoid mismatches. Note that heat range, thread size, and reach must match the original plug to prevent damage or poor performance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify vehicle make, model, year, and engine code against NGK fitment lists.\u003c\/li\u003e\n  \u003cli\u003eCheck thread size and electrode reach in your service manual for compatibility.\u003c\/li\u003e\n  \u003cli\u003eUse aftermarket fitment confirmation tools (e.g., retailer fitment) when available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these differ from premium or iridium NGK plugs?\u003c\/h3\u003e\n\n\u003cp\u003eThe BR8ES (3961) is a standard copper-core style spark plug intended for routine replacement and standard durability. Premium or iridium variants use finer electrodes and different materials for longer life and higher-temperature capabilities, which may be recommended for performance or extended-service intervals.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eBR8ES: standard electrode materials for typical service intervals and cost-effective replacement.\u003c\/li\u003e\n  \u003cli\u003eIridium\/titanium variants: finer electrodes and extended life for specific high-performance needs.\u003c\/li\u003e\n  \u003cli\u003eChoose based on manufacturer recommendation and driving conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This NGK BR8ES (3961) set of four is ideal for owners and mechanics looking for a genuine, budget-friendly replacement that matches factory specifications. It suits routine maintenance on small to mid-sized engines that specify BR8ES\/3961, DIYers replacing a full set of plugs, and fleet or service shops needing authentic NGK parts to maintain original equipment standards. Always confirm fitment for your exact engine to ensure correct selection.\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: Will these BR8ES plugs fit my car?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check your vehicle’s service manual or an online fitment tool for BR8ES or part number 3961 compatibility before purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How often should I replace these spark plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Follow your vehicle manufacturer’s recommended interval; standard plugs commonly change every 20,000–50,000 miles depending on use.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NGK","offers":[{"title":"Default Title","offer_id":48084436156574,"sku":"B00M5FFW0G","price":30.14,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ngk-br8es-front-packaging_879562c0-58cc-4c6f-b097-93c15fc9a412.jpg?v=1785855210","url":"https:\/\/northtrailauto.ca\/products\/ngk-spark-plug-br8es-3961-set-of-4-standard-replacement-copper-plugs-pre-gapped","provider":"North Trail Auto","version":"1.0","type":"link"}