ENA Iridium Spark Plug & Ignition Coil Kit — Set of 6 Plugs + 6 Coils, UF550-Compatible Direct-Fit for 3.5L V6 Nissan/Infiniti

If your 3.5L V6 Nissan or Infiniti is due for ignition service, this ENA kit supplies both high-performance iridium plugs and matched coil packs in one package. Built for direct-fit replacement, the components are engineered to meet original equipment form, fit, and function while delivering long life, straightforward installation, and dependable operation under typical driving conditions.

Which vehicles and engines will this ENA kit fit?

This set is designed for a wide range of Nissan and Infiniti 3.5L V6 applications. It covers many model years of Maxima, Murano, Pathfinder, Altima, Infiniti Q50, QX60, FX35 and others listed by the manufacturer, ensuring compatibility where UF550-style spark plugs and matching coil packs are specified.

• Infiniti: EX35, FX35, G25/G35, JX35, M35/M35h, Q50, Q70, QX60 (specific years noted by ENA)
• Nissan: 350Z, Altima, Maxima, Murano, Pathfinder, Quest across compatible model years
• Replacement references: UF550, C1670, 22448-JA10C, IC630 and similar part numbers
• Always verify fit by checking vehicle year, engine code, or using your vehicle’s parts lookup

How do the iridium plugs and coil packs affect performance and service life?

Iridium spark plugs use a fine center electrode that promotes consistent ignition and longer electrode life compared with standard copper plugs. When paired with fresh, matched coil packs, you get steadier spark delivery, improved cold starts, and reduced misfire risk when components are installed correctly.

• Longer electrode life thanks to iridium construction
• Improved spark consistency for smoother idle and throttle response
• Reduced need for frequent replacements compared with lower-grade plugs
• Matched coils help ensure proper ignition timing and cylinder performance

What should I expect during installation and maintenance?

ENA designs these parts for direct replacement, so installation is typically straightforward for anyone with basic automotive tools and mechanical confidence. Torque spark plugs to the vehicle manufacturer’s specification and inspect wiring harnesses; replace one cylinder at a time to avoid mix-ups and ensure correct coil orientation.

• Quick swap procedure with direct-fit connectors and plug threads
• Recommended: use a torque wrench and dielectric grease on coil boots if specified
• Inspect ignition harness and boot seals during installation for best reliability
• Follow manufacturer torque settings and gap specifications if re-gapping is necessary

What warranty and part references come with the ENA kit?

ENA backs this kit with a 24-month warranty for peace of mind against manufacturing defects. The kit lists multiple cross-reference part numbers to help confirm compatibility with original equipment and dealer parts catalogs.

• 24-month limited warranty from ENA
• Cross-references include UF550, 22448-JA10C, IC630 and others for verification
• Recommended to confirm compatibility using year/model/engine lookup tools before purchase
• Replacement set includes six iridium plugs and six coil packs for full-bank service

Who is this for: drivers and DIY mechanics who own Nissan or Infiniti vehicles powered by a 3.5L V6 and need a full ignition-bank refresh. This ENA set is suitable for those replacing worn plugs and coils at scheduled service intervals, addressing misfires, or upgrading to longer-lasting iridium technology, and for professional shops seeking a complete, direct-fit aftermarket kit.