GDUKOP Ignition Coil & Iridium Spark Plug Kit for Nissan/Infiniti 6-Piece 3.5L — 6 Coils + 6 Plugs, UF550 Replacement

GDUKOP’s 6-piece ignition coil and iridium spark plug kit replaces UF550-style units to restore reliable spark and smooth running in many Nissan and Infiniti 3.5L engines.

This complete kit includes six ignition coils matched with six iridium spark plugs engineered for fitment across a wide set of Nissan and Infiniti V6s (3.5L and select 2.5L applications). Each coil and plug combo is manufactured from durable materials designed to deliver consistent firing, reduce misfires and provide a long service life when installed as part of routine maintenance. The pack replaces common OE and aftermarket reference numbers so you can match it to your vehicle parts list with confidence.

Which vehicles and engine codes will this kit fit?

The kit is built for a range of Nissan and Infiniti V6 platforms from model years listed by the manufacturer. It covers many popular models including Altima, Maxima, Murano, Pathfinder, 350Z, and multiple Infiniti G, EX, FX, M, Q and QX series where the 3.5L V6 (and the listed 2.5L G25 variant) is specified.

• Nissan: 350Z (2007–2009), Altima V6 (2007–2018), Maxima (2009–2020), Murano (2009–2020), Quest (2011–2017), Pathfinder (2013–2020).
• Infiniti: G35 (2007–2008), EX35 (2008–2012), M35/FX35 (various 2009–2012 years), G25 (2011–2012), M35h (2012–2013), JX35 (2013), Q50/Q70 (2014–2018), QX60 (2014–2020).
• Replaces common part numbers including UF550 and listed cross-references for direct compatibility checks.

How do these coils and iridium plugs affect engine performance?

Consistent spark delivery is essential for smooth idle and efficient combustion. The iridium tips provide a stable spark gap and the coils supply a reliable high-voltage pulse, which helps reduce misfires and supports steady throttle response under normal operating conditions.

• Iridium plugs: finer electrode for dependable spark and extended interval between replacements.
• Ignition coils: designed for consistent output to maintain firing across cylinders.
• Combination reduces rough idle and helps maintain drivability when installed correctly.

What quality and replacement details should I know before buying?

These components are produced from quality materials intended to match or exceed typical aftermarket standards. They’re sold as a matched six-piece set to replace all cylinders at once, avoiding partial upgrades that can leave older components limiting performance.

• Manufactured components for longer working life and stable spark delivery.
• Sold as a full 6-coil + 6-plug kit for complete cylinder coverage.
• Cross-referenced with UF550 and many OEM/aftermarket part numbers for fit verification.

How difficult is installation and maintenance for a DIYer?

Installation is straightforward for anyone comfortable with basic engine-bay work and hand tools. Removing the engine cover (if present), unplugging harnesses, and swapping coils and plugs cylinder-by-cylinder helps prevent cross-threading and ensures correct torque on plugs.

• Standard tools: socket wrench, torque wrench, spark plug socket, dielectric grease optional.
• Replace one cylinder at a time to preserve firing order and wiring positions.
• Follow vehicle torque specs and gap checks when fitting the iridium plugs.

Who this is for: drivers and independent mechanics who own compatible Nissan or Infiniti V6 models and want a complete, matched ignition coil and iridium spark plug replacement kit. This set suits owners doing preventative maintenance or resolving misfire and rough-running symptoms where OE-style UF550 replacements are specified. If you need full-cylinder coverage with easily cross-referenced part numbers, this kit provides a cost-effective single-purchase solution.