BELKEBIR Ignition Coil Pack & Iridium Spark Plugs Kit — 6PCS UF550 Fit 3.5L V6, High-Energy Coils

BELKEBIR 6PCS ignition coil pack and iridium spark plugs are a direct-fit replacement kit designed to restore reliable spark delivery for 3.5L V6 Nissan and Infiniti engines.

If your V6 is showing misfires, rough idle, reduced acceleration, or fluctuating fuel economy, a worn coil pack or aging spark plugs are common causes. This kit includes six UF550-style ignition coils plus six iridium-tipped spark plugs, matched to factory specifications so you can swap parts quickly and get your engine back to consistent performance without guessing on fitment.

Which vehicles will these ignition coils and spark plugs fit?

This BELKEBIR kit was engineered for Nissan and Infiniti vehicles equipped with the 3.5L V6. It covers a wide range of model years and trims so you can replace all six cylinders at once for balanced operation.

• 2007–2009 Nissan 350Z V6 3.5L; 2007–2018 Nissan Altima V6 3.5L
• 2009–2018+ Nissan Maxima, Murano, Pathfinder, Quest with 3.5L V6
• Infiniti EX35, FX35, G35, JX35, M35/M35h, Q50, Q70, QX60 with 3.5L V6
• Replaces common OEM part numbers such as UF550, 22448-JA10C, 22448-JA11C and spark plug numbers like 22401EZ37C

How do these parts improve engine behavior right away?

The ignition coils deliver high-energy pulses while the iridium plugs offer a dependable spark gap that resists wear. Together they reduce misfires, improve throttle response, and help stabilize idle compared with worn originals.

• High-energy coil output for consistent firing across all cylinders
• Iridium electrodes for longer service life and steady ignition
• Balanced replacement of all six units to restore even combustion

Are these a straightforward swap for do-it-yourselfers and shops?

Yes — each coil and plug is manufactured to OEM-style dimensions and electrical specifications so they plug into the existing harness and threads without modification. Typical installation only requires basic hand tools and an appropriate torque wrench for the spark plugs.

• Plug-and-play coils that match factory connectors and mounting points
• Thread-design spark plugs for proper sealing and heat range
• Full-six set avoids mixing new and old parts for consistent results

What are the key material and performance highlights?

The kit pairs robust coil internals with iridium-tipped plugs built to endure combustion stress. This combination emphasizes longevity and steady performance instead of short-term gains.

• Iridium center electrode for improved wear resistance and reliable spark
• Coils designed for high voltage output and thermal stability
• Manufactured to meet or exceed common OEM electrical and dimensional standards

Who is this for? This BELKEBIR 6PCS ignition coil and iridium spark plug kit is aimed at owners and mechanics who need a full-cylinder replacement for Nissan and Infiniti 3.5L V6 engines. It’s suitable for drivers experiencing engine misfires, intermittent rough idle, or reduced responsiveness who want quality replacement parts that match OEM fitment. If you prefer to replace all coils and plugs at once to ensure even performance and avoid repeat shop visits, this complete six-pack kit is a practical, time-saving option.