{"product_id":"ifatrunk-iridium-spark-plugs-6-pack-for-v6-3-5l-4-0l-nissan-infiniti-laser-welded-long-life-performance","title":"IFATRUNK Iridium Spark Plugs 6-Pack for V6 3.5L–4.0L Nissan\/Infiniti — Laser‑Welded, Long-Life Performance","description":"\u003cb\u003eIFATRUNK Iridium Spark Plugs 6 Pack delivers a long-life, precision ignition solution compatible with many Nissan, Infiniti, Toyota, Kia and Hyundai V6 engines.\u003c\/b\u003e\n\nThese six iridium-tipped spark plugs are built for vehicles that require the 4469 \/ LFR5AIX11 style plug. Their fine iridium central electrode and laser-welded construction prioritize consistent spark performance, improved ignition stability and extended service intervals compared with standard copper plugs. The set is intended for a wide range of V6 engines — including Nissan 3.5L and 4.0L models, certain Infiniti V6s, and some Toyota, Kia and Hyundai V6 vehicles — and replaces many cross-reference numbers such as XP5325, LZFR5C11 and others listed by manufacturers.\n\n\u003ch3\u003eWhich vehicles will these spark plugs fit?\u003c\/h3\u003e\n\u003cp\u003eIFATRUNK supplies this six-pack for many V6 engines commonly found in mid-2000s to mid-2010s models. Fitment covers Nissan 350Z, Altima, Maxima, Murano, Xterra, Frontier, Pathfinder and NV series, plus select Infiniti, Kia, Hyundai and Toyota V6 platforms.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCommon Nissan\/Infiniti models with 3.5L or 4.0L V6 engines (2001–2019 ranges as cited).\u003c\/li\u003e\n  \u003cli\u003eSelected Kia (Optima, Rondo, Borrego) and Hyundai (Santa Fe, Genesis) V6 cars where 2.7–3.8L fits.\u003c\/li\u003e\n  \u003cli\u003eToyota 4Runner and Tundra V6 4.0L years noted (2013–2014\/2020 overlaps).\u003c\/li\u003e\n  \u003cli\u003eCross-reference numbers included for quick verification: 4469, LFR5AIX-11, XP6003 and more.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do iridium electrodes affect engine performance?\u003c\/h3\u003e\n\u003cp\u003eThe iridium center electrode is very thin (about 0.4–0.6 mm) and laser-welded, concentrating spark energy for a cleaner ignition event. That design helps more reliable starts, steadier idle and better throttle response compared with larger-electrode plugs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSmaller electrode diameter focuses spark for stronger combustion initiation.\u003c\/li\u003e\n  \u003cli\u003eLaser-welded iridium improves resistance to erosion and extends service life.\u003c\/li\u003e\n  \u003cli\u003eCan help stabilize ignition in cold starts and under lean or high-RPM conditions.\u003c\/li\u003e\n  \u003cli\u003eMay contribute to modest fuel-use consistency through more complete burns.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the build details and quality features?\u003c\/h3\u003e\n\u003cp\u003eThese IFATRUNK plugs use an iridium alloy center electrode combined with robust manufacturing standards to reduce both thermal and electrical wear. The base, insulator and thread profiles match OEM-style dimensions for straightforward replacement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIridium central electrode, 0.4–0.6 mm diameter, laser welded for durability.\u003c\/li\u003e\n  \u003cli\u003eManufactured to match OEM thread and reach specifications for listed applications.\u003c\/li\u003e\n  \u003cli\u003eSold as a 6-piece kit so you can replace a full V6 cylinder bank at once.\u003c\/li\u003e\n  \u003cli\u003eIncludes cross-reference numbers to confirm compatibility before purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and what should I check before buying?\u003c\/h3\u003e\n\u003cp\u003eInstalling these plugs is the same process as most OEM replacements: remove old plugs, gap verification if necessary, and torque to manufacturer specs. Always confirm the vehicle year, engine size and OEM part number before ordering to prevent fitment issues.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRecommended to check OEM torque values and use anti-seize only if specified by manufacturer.\u003c\/li\u003e\n  \u003cli\u003eVerify vehicle model year and engine displacement (2.7L–4.0L V6 ranges listed).\u003c\/li\u003e\n  \u003cli\u003eInspect spark plug boot condition and ignition coils when replacing plugs.\u003c\/li\u003e\n  \u003cli\u003eIFATRUNK customer support is available if you encounter issues after purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\nWho is this for?\n\nThis six-pack is aimed at DIY mechanics, independent shops and fleet owners who need a direct-replacement iridium spark plug for compatible V6 engines across Nissan, Infiniti, Toyota, Kia and Hyundai lines. Choose IFATRUNK if you want a long-life electrode that concentrates spark energy for steadier ignition and a complete set to service an entire V6 bank in one purchase. Always confirm fitment against your vehicle’s factory part number or consult a technician when in doubt.\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these plugs match OEM part LFR5AIX11?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — they are designed as direct replacements for LFR5AIX11\/4469-compatible applications.\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 iridium spark plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Iridium plugs typically last longer than copper ones; follow your vehicle maker’s interval or inspect every 60,000–100,000 miles.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"IFATRUNK","offers":[{"title":"Default Title","offer_id":67591455473849,"sku":"B0FDR77H3R","price":66.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/ifatrunk-front-packaging.jpg?v=1790551745","url":"https:\/\/redleafauto.ca\/products\/ifatrunk-iridium-spark-plugs-6-pack-for-v6-3-5l-4-0l-nissan-infiniti-laser-welded-long-life-performance","provider":"Redleaf Auto","version":"1.0","type":"link"}