KacuYelin UF549 Ignition Coil Pack & Double‑Iridium Spark Plug Kit Set of 4 — Direct‑Fit OEM‑Grade

This kit combines direct-fit ignition coils and premium double‑iridium spark plugs designed as a one‑stop replacement for worn or failing ignition components. Built to match OEM fitment and electrical output, the UF549 coil packs use high‑purity copper windings and temperature‑resistant materials to reduce misfires and coil deterioration. The matching double‑iridium spark plugs use continuous laser welding and high‑alumina ceramic insulation for longer life and more consistent combustion across a wide range of driving conditions.

Which vehicles and engines does this kit fit?

This set is designed for many Nissan and Infiniti models with 4‑cylinder engines from roughly 2005 through 2020. It replaces factory part numbers such as 22448ED000 and C1696 and fits common displacements like 1.6L, 1.8L, 2.0L and 2.5L.

• Compatible models include Altima, Cube, Frontier, NV200, Rogue, Sentra, Versa, Versa Note, and select Infiniti models
• Check year, model, engine size and aspiration to confirm exact compatibility
• Direct plug‑and‑play replacements for specified OEM numbers

How do the coil packs improve ignition performance?

The UF549 coils use German‑imported copper windings and a silicon steel core to deliver stable high voltage while resisting oxidation and heat breakdown. That stability helps reduce misfires, rough idle and intermittent no‑start conditions caused by degraded coils.

• High‑purity copper windings for efficient power transfer
• Epoxy resin and corrosion‑resistant materials for long life
• Engineered to match OE electrical output for consistent firing

What benefits do the double‑iridium spark plugs provide?

These plugs use a 360° continuous laser weld and cold extrusion on the center electrode with high iridium content for stronger spark concentration and extended wear life. High‑density alumina ceramic insulators maintain excellent heat resistance and electrical isolation.

• Up to 90% iridium content for superior erosion resistance
• 360° laser welding for focused, reliable sparks
• Rated longevity typically in the 80,000–120,000 mile range under normal use

Will installing this kit affect fuel economy and emissions?

Replacing worn coils and plugs can restore efficient combustion and reduce incomplete burning that raises fuel use and emissions. While results vary by vehicle and driving habits, improved ignition consistency typically reduces rough running and can help optimize MPG.

• More accurate ignition timing and stronger sparks improve fuel burn
• May reduce engine symptoms like lack of power and increased fuel consumption
• Designed to meet EPA emissions expectations when installed correctly

Who is this for: Drivers and DIY mechanics who own compatible Nissan or Infiniti 4‑cylinder models and want a direct‑fit, higher‑durability replacement for aging ignition coils and spark plugs. This kit is suited to anyone repairing misfires, restoring drivability, or preferring longer service intervals without changing OEM wiring or connectors. Always confirm vehicle year, model, engine and OEM part references before purchasing and consult a professional installer if unsure.