KacuYelin UF491 Ignition Coil Pack & Iridium Spark Plug Kit — Set of 4 for GM 2.2L–2.4L (Direct-Fit, High-Durability)

A complete set of four KacuYelin UF491 ignition coil packs with four iridium spark plugs engineered to replace OE UF645/5C1609/XP5263 and restore reliable ignition across compatible GM 4-cylinder engines. This kit bundles four high-quality ignition coils and four iridium-tipped spark plugs manufactured by KacuYelin in TS16949-certified facilities. Each coil uses high-purity copper windings and temperature-resistant epoxy for stable high-voltage delivery, while the iridium plugs feature laser-welded center electrodes and durable ceramics to maintain spark consistency and long service life. The set is designed as a direct-fit replacement for a wide range of Chevy, GMC, Buick, Saturn, Pontiac, and Saab models from roughly 2005 through 2017.

Which vehicles and engines will this set fit?

The kit is intended for GM 4-cylinder applications that use the UF491/UF645 family of coils and corresponding spark plugs. Fitment includes specific model years and 2.2L–2.4L engines across Chevrolet, GMC, Buick, and other GM brands. Always confirm your vehicle year, model, engine size, and submodel before ordering to ensure compatibility.

• Common fits: Chevy HHR, Cobalt, Equinox, Malibu, Captiva Sport, Orlando
• GMC Terrain 2.4L and Buick LaCrosse/Regal/Verano 2.4L
• Replaces OE references such as UF-491, 12638824, 5C1609, UF645, and related numbers

How do the coils and plugs improve engine performance?

The coils deliver consistent high-voltage output thanks to premium copper windings and a silicon steel core that resists oxidation and heat. The iridium spark plugs concentrate the spark with a laser-welded center electrode and high-alumina ceramic body to resist wear and reduce fouling, helping combustion stay efficient.

• More stable ignition reduces misfires and rough idle
• Concentrated spark improves combustion and throttle response
• Durable materials extend service life and lower replacement frequency

What are the technical features and materials used?

The coil packs use German-imported copper and robust epoxy resin to maintain insulation under high temperature. The iridium plugs combine a 360° laser-welded center electrode with high-purity nickel content and 95% alumina ceramic for superior heat resistance and electrical insulation.

• High-purity copper windings and silicon steel core in coils
• 360° continuous laser welding on the iridium electrode
• High-alumina ceramics for heat resistance and stable insulation

Will installing this kit affect fuel economy or emissions?

Replacing worn coils and plugs can restore combustion efficiency, which often reduces fuel consumption and lowers emissions compared with degraded ignition components. While exact gains vary by vehicle condition, this kit is designed to meet OEM fitment and support cleaner combustion when installed correctly.

• Optimized spark timing can improve MPG under normal driving
• Reduced misfires lower unburned hydrocarbons and exhaust emissions
• Direct plug-and-play design for straightforward replacement

Who is this for? This KacuYelin UF491 coil and iridium plug set is for DIY mechanics, independent repair shops, and owners of compatible GM 4-cylinder vehicles who want factory-style fitment and materials without the dealer price. It's a practical choice when diagnosing repeated misfires, poor cold starts, decreased fuel economy, or when performing scheduled ignition maintenance. Confirm your vehicle details in the fitment tool before purchase to ensure a correct match.

FAQ

Q: Do these coils and plugs fit my 2010 Chevy Equinox 2.4L?

A: Yes — the kit lists compatibility with 2010–2017 Equinox 2.4L, but confirm exact engine and submodel before purchase.

Q: How long do the iridium spark plugs typically last?

A: Iridium plugs in this kit are rated for long service life, commonly 60,000 to 100,000 miles depending on driving conditions.