A-NAFTULY Iridium Spark Plugs 6-Pack for Nissan/Infiniti 3.5L V6 — 0.6mm Fine-Wire, Laser-Welded Durability

A-NAFTULY Iridium Spark Plugs (6-pack) are high-durability, fine-wire iridium replacements engineered to restore reliable ignition and better fuel efficiency for many Nissan, Infiniti, Toyota, Hyundai and Kia V6 engines.

These replacement spark plugs (reference numbers include 4469, LFR5AIX-11 and variants) use a 0.6 mm iridium fine-wire center electrode and laser-welded construction for improved wear resistance and consistent spark performance. Sold as a set of six, they match OEM specifications for a wide range of 3.5L and 4.0L V6 engines — including Nissan Altima, Maxima, Murano, Pathfinder, Frontier, Xterra and Infiniti G35/FX35 models — plus additional compatible vehicles listed in the product details. The plugs are intended to deliver stable combustion, longer service life and optimized fuel use without major engine modifications.

How will these plugs change starting, throttle response and idle quality?

Because of the fine-wire iridium center electrode and precise gap control, these plugs promote stronger, more consistent sparks across operating conditions. That typically improves cold starts, smooths idle, and sharpens initial throttle response compared with worn or fouled plugs. Results depend on engine condition and proper installation.

• 0.6 mm iridium center electrode for focused spark energy
• Laser-welded tip for consistent spark location and longevity
• Matched gap and OE-style threads for reliable installation
• Sold in a 6-pack to replace all V6 cylinder plugs at once

Which engines and vehicles are these A-NAFTULY plugs compatible with?

This set is designed to fit many Nissan and Infiniti V6 models (notably 3.5L and some 4.0L applications) and several other makes where the LFR5AIX11 equivalent is specified. Always cross-check the reference numbers and your vehicle’s service manual before ordering to ensure the correct part for your model year and engine.

• Common Nissan fits: Altima, Maxima, Murano, 350Z, Frontier, Pathfinder, Quest, Xterra, NV models
• Common Infiniti fits: G35, FX35, I35, M35, QX4
• Additional compatible vehicles include select Toyota, Hyundai and Kia models where applicable
• Reference numbers included to confirm compatibility (4469, LFR5AIX-11, XP5325, etc.)

What materials and construction features improve durability and economy?

The center electrode is an iridium alloy, which offers a much higher melting point and greater hardness than platinum, so it resists erosion and electrical wear. Laser welding secures the fine-wire tip, reducing the chance of tip displacement and maintaining consistent performance over many miles. These design choices aim to prolong service life and support efficient combustion.

• Iridium fine-wire electrode — high heat resistance and wear durability
• Laser-welded tip for mechanical and electrical stability
• OE-style shell and sealing washer for proper seat and compression
• Manufactured to meet electrical and fitment standards for the specified vehicles

Do these plugs come with warranty or customer support?

A-NAFTULY includes a 12-month limited warranty with the 6-pack, and customer support is available for fitment or product questions. Keep proof of purchase and follow recommended installation practices to avoid installation-related issues.

• Set includes six iridium spark plugs for complete V6 replacement
• 12-month worry-free warranty from A-NAFTULY
• Customer support for fitment and post-purchase assistance
• Follow torque and gap specs per vehicle service manual for best results

Who is this for: Drivers and independent mechanics who need an OEM-equivalent, long-life spark plug option for mid-2000s Nissan and Infiniti V6 engines (and other compatible vehicles), aiming for improved ignition stability and reduced maintenance frequency. If you prefer a direct-fit replacement that emphasizes durability and consistent combustion, this A-NAFTULY 6-pack addresses those priorities while matching common OE reference numbers.