IFATRUNK Iridium Spark Plugs 6-Pack for V6 3.5L–4.0L Nissan/Infiniti — Laser‑Welded, Long-Life Performance

IFATRUNK Iridium Spark Plugs 6 Pack delivers a long-life, precision ignition solution compatible with many Nissan, Infiniti, Toyota, Kia and Hyundai V6 engines. These 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.

Which vehicles will these spark plugs fit?

IFATRUNK 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.

• Common Nissan/Infiniti models with 3.5L or 4.0L V6 engines (2001–2019 ranges as cited).
• Selected Kia (Optima, Rondo, Borrego) and Hyundai (Santa Fe, Genesis) V6 cars where 2.7–3.8L fits.
• Toyota 4Runner and Tundra V6 4.0L years noted (2013–2014/2020 overlaps).
• Cross-reference numbers included for quick verification: 4469, LFR5AIX-11, XP6003 and more.

How do iridium electrodes affect engine performance?

The 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.

• Smaller electrode diameter focuses spark for stronger combustion initiation.
• Laser-welded iridium improves resistance to erosion and extends service life.
• Can help stabilize ignition in cold starts and under lean or high-RPM conditions.
• May contribute to modest fuel-use consistency through more complete burns.

What are the build details and quality features?

These 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.

• Iridium central electrode, 0.4–0.6 mm diameter, laser welded for durability.
• Manufactured to match OEM thread and reach specifications for listed applications.
• Sold as a 6-piece kit so you can replace a full V6 cylinder bank at once.
• Includes cross-reference numbers to confirm compatibility before purchase.

How easy is installation and what should I check before buying?

Installing 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.

• Recommended to check OEM torque values and use anti-seize only if specified by manufacturer.
• Verify vehicle model year and engine displacement (2.7L–4.0L V6 ranges listed).
• Inspect spark plug boot condition and ignition coils when replacing plugs.
• IFATRUNK customer support is available if you encounter issues after purchase.

Who is this for? This 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.

FAQ

Q: Do these plugs match OEM part LFR5AIX11?

A: Yes — they are designed as direct replacements for LFR5AIX11/4469-compatible applications.

Q: How often should I replace these iridium spark plugs?

A: Iridium plugs typically last longer than copper ones; follow your vehicle maker’s interval or inspect every 60,000–100,000 miles.