BELKEBIR Ignition Coil Pack & Iridium Spark Plugs Kit — Set of 6 for 3.5L V6 (2007–2020)

BELKEBIR's set of six ignition coil packs plus iridium spark plugs replaces UF550 and restores reliable ignition for 3.5L V6 Nissan and Infiniti engines. This complete replacement kit bundles six direct-fit ignition coils with six premium iridium spark plugs engineered for Nissan and Infiniti models that use the 3.5L V6 engine. Designed as a plug-and-play, OEM-style swap, the components fit a wide range of model years and part numbers to make maintenance straightforward and reduce drivability issues caused by failing coils or worn plugs.

Which vehicles and part numbers does this kit fit?

This kit is listed for many Nissan and Infiniti vehicles equipped with the 3.5L V6 engine across model years 2007–2020. It matches common OEM references so you can cross-check before purchase.

• Compatible Nissan models: 350Z, Altima, Maxima, Murano, Pathfinder, Quest (various 2007–2020 years)
• Compatible Infiniti models: EX35, FX35, G25/G35, JX35, M35/M35h, Q50, Q70, QX60 (listed years)
• Replaces ignition coil UF550 and related numbers like 22448-JA10C; spark plug references include 22401EZ37C and XP5683

How will these coils and iridium plugs affect engine performance?

Replacing aged coils and worn spark plugs can help stabilize combustion and improve throttle response. While results depend on engine condition, fresh coils and iridium plugs typically reduce misfires and promote smoother running under load.

• Higher energy output from coils for more consistent sparks
• Iridium electrodes resist wear and maintain spark gap longer
• Can help restore acceleration and steadier idle if ignition components were degraded

Are these parts easy to install and do they meet OEM standards?

The BELKEBIR kit is built as a direct OEM-style replacement, with plug-and-play connectors and factory-equivalent dimensions. Installation is straightforward for anyone comfortable with basic engine work; torque specs and gap checks should follow manufacturer guidance.

• Direct-fit design for bolt-on replacement with original connectors
• No special programming or adapters required in most installs
• Manufactured to match factory performance and physical specifications

What are the durability and maintenance benefits of iridium plugs here?

Iridium-tipped spark plugs use a harder, more wear-resistant electrode than traditional copper tips, which preserves spark quality over longer intervals. That translates to longer service life and fewer replacements compared with basic plug types.

• Fine iridium electrodes hold the spark gap longer under heat and wear
• Improved cold-start ignition and consistent performance across seasons
• Reduced frequency of plug changes versus standard copper plugs

Who is this for This BELKEBIR ignition coil and iridium plug set is ideal for owners and technicians maintaining Nissan or Infiniti vehicles with the 3.5L V6 who want a full-bank replacement. Choose this kit if you have misfires, rough idle, reduced throttle response, or if your vehicle is due for a scheduled ignition component refresh and you want OEM-style fit plus longer-lasting iridium plugs. Always verify compatibility with your vehicle’s VIN and existing part numbers before installation.

FAQ

Q: Will these replace UF550 coils on my 2010 Nissan Maxima?

A: Yes, the set lists UF550 and related OEM numbers and fits many 2009–2014 Maxima 3.5L engines; verify by matching your current coil part number.

Q: Do the iridium plugs require a special gap or tool?

A: They come pre-gapped to OEM specs for most applications; check and adjust gap per manufacturer torque and gap recommendations if needed.