KacuYelin UF491 Ignition Coil Pack & 4 Iridium Spark Plugs Kit — Direct-Fit for GM 2.2L/2.4L (2005–2017), Long-Life Performance

This complete ignition set includes four high-voltage coil packs built with German-imported copper windings and four long-life iridium spark plugs. Designed as a direct replacement for OE numbers such as UF-491, UF645, 5C1609 and others, the kit aims to match factory specifications so you can replace faulty coils and worn plugs in one service interval. The components are manufactured in TS16949-certified facilities and tested to deliver consistent spark, corrosion resistance and improved combustion stability across a range of Chevy, GMC, Buick, Saturn, Pontiac and Saab vehicles.

Which vehicles and engines does this ignition kit fit?

This KacuYelin kit is tailored for GM compact and midsize models using 2.2L or 2.4L inline-4 engines across model years roughly 2005–2017. Always verify fitment by entering Year, Brand, SubModel, Engine Size and Aspiration in the vehicle-fit tool before purchase.

• Chevrolet: Captiva Sport, Cobalt, Equinox, HHR, Malibu, Orlando (specified years and 2.2L/2.4L engines)
• GMC: Terrain 2.4L (2010–2017)
• Buick: LaCrosse, Regal, Verano 2.4L (specified years)
• Also compatible with select Saturn, Pontiac and Saab models using matching OE numbers

How do the coil packs and iridium plugs improve ignition performance?

The coil packs use high-purity copper windings, a silicon-steel core and high-temperature epoxy to deliver steady high-voltage output and resist corrosion. The iridium spark plugs employ a continuous laser-welded center electrode and high-alumina ceramic insulator for a focused, durable spark and stable combustion.

• Stable high-voltage output reduces misfires and weak spark events
• Iridium center electrode resists wear for long service life (60k–100k miles typical)
• High-temperature materials and anti-oxidation finishes extend component longevity
• Direct-fit design ensures plug-and-play replacement without modification

What practical benefits can I expect after installing this kit?

Replacing both the coils and plugs at the same time restores efficient ignition timing and spark energy, often improving throttle response and reducing rough idle. While results vary by vehicle condition, customers commonly see reduced misfires, more consistent starts and cleaner combustion.

• Potential fuel-efficiency improvement when ignition was previously compromised
• Reduced engine hesitation, stumbling and start-up issues
• Lower carbon buildup and fewer ignition-related fault codes
• Compatibility with EPA standards when properly installed

Is installation straightforward and what should I check first?

Yes — the components are manufactured to OEM dimensions for direct plug-and-play replacement. Before installing, confirm the OE cross-reference numbers and vehicle fitment; inspect wiring harnesses and connectors for damage or corrosion to ensure reliable connections.

• Confirm fit by Year, Brand, SubModel, Engine Size and Aspiration
• Inspect coil connector pins and spark plug wells for debris or oil
• Torque spark plugs to manufacturer spec and ensure coil boots seat fully
• Clear any fault codes and test drive to verify resolution of issues

Who is this for: This KacuYelin UF491 ignition coil and iridium spark plug kit is intended for DIY mechanics and professional technicians working on GM 2.2L and 2.4L inline-4 engines who need a reliable, OE-matching replacement. It suits owners experiencing misfires, rough idle, decreased fuel economy or recurring ignition-related trouble codes, and anyone who prefers replacing coils and plugs together to restore engine smoothness and dependability.