KacuYelin Ignition Coil Pack & Iridium Plugs Set of 5 UF303 — Fits Chevy GMC Hummer Isuzu 3.5L

The KacuYelin UF303 ignition coil pack with five iridium spark plugs is a direct-fit replacement kit engineered to restore reliable spark, improve combustion stability, and match OEM specifications for specified Chevrolet, GMC, Hummer and Isuzu 3.5L/2.8L/2.9L engines.

This complete ignition set bundles a UF303 coil pack built with high-purity copper windings, a silicon-steel core and heat-resistant epoxy with five long-life iridium spark plugs. Together they are designed to deliver consistent high-voltage output and concentrated sparks for better ignition control. The kit is manufactured in TS16949-certified facilities and carries multiple OE references (12568062, 19300921 and others) so you can replace worn components with confidence.

Which vehicles and engines will this kit fit?

This KacuYelin set is tailored for a specific group of GM and Isuzu models from the mid-2000s. Confirm year, model, engine displacement and submodel in your vehicle fitment tool before ordering to ensure an exact match.

• Chevrolet Colorado 2004–2006: 2.8L L4 and 3.5L L5
• GMC Canyon 2004–2006: 2.8L L4 and 3.5L L5
• Hummer H3 2006: 3.5L L5
• Isuzu i-280 2006: 2.8L L4; i-290 2007–2008: 2.9L L4; i-350 2006: 3.5L L5; i-370 2007–2008: 3.7L L5

How do the ignition coil and iridium plugs improve performance?

The coil pack uses premium materials—imported copper windings and a silicon-steel core—encased in a high-temperature epoxy to maintain stable voltage and resist corrosion. The iridium plugs feature a continuous laser-welded center electrode and high-purity nickel for extended wear resistance. Together they aim to support more reliable starts, stable idling and reduced misfires when installed correctly.

• High-voltage stability from corrosion-resistant coil materials
• Concentrated, stronger sparks from 360° laser-welded iridium electrodes
• Improved resistance to electrode wear and oxidation for long service life
• Direct OEM-matching form factor for plug-and-play installation

What are the durability and manufacturing highlights?

KacuYelin manufactures this kit in TS16949-certified facilities and follows tested production processes. The spark plugs use 95% alumina ceramics for heat resistance and insulation, while nickel content and cold-extrusion processes improve longevity. The coil pack’s materials reduce oxidation and support consistent output across operating temperatures.

• TS16949-certified production for consistent quality control
• High alumina ceramic insulators for thermal and electrical stability
• Nickel-rich electrodes and cold-extrusion for long life (60,000–100,000 miles typical range)
• Multiple OE references included for compatibility verification

Will this kit affect fuel economy or emissions?

Replacing degraded ignition components can restore ignition efficiency and reduce incomplete combustion that contributes to higher fuel use and emissions. The manufacturer reports potential fuel-efficiency gains after installation, but actual results depend on vehicle condition and driving habits. This product is designed to meet standard emission-related fitment expectations, but no regulatory claim is made here.

• Optimized spark for more complete combustion under proper engine conditions
• Reduced carbon deposition from precise ignition timing and stronger sparks
• Designed to align with OEM emission-function expectations when fitted correctly

Who this is for: This KacuYelin UF303 coil pack plus five iridium spark plugs kit is intended for owners and mechanics restoring mid-2000s Chevrolet Colorado, GMC Canyon, Hummer H3 and compatible Isuzu models who need an OEM-matching, long-life ignition solution. It suits DIY installers and professional shops replacing failing coils or worn spark plugs, provided you verify exact year, engine and submodel compatibility before purchase.