KacuYelin UF247 Ignition Coil Pack and Iridium Spark Plug Kit for 1.8L Toyota/Chevrolet 1999–2008 — Set of 4, Plug-and-Play

KacuYelin UF247 is a plug-and-play ignition coil pack and four iridium spark plugs kit designed to restore reliable spark and steady combustion on 1.8L Toyota, Chevrolet Prizm and Pontiac Vibe engines from 1999–2008.

This complete ignition kit combines four high-performance ignition coils built with German-imported copper windings and four precision iridium spark plugs. Together they replace worn OEM parts (replaces #5C1074, 4503 and equivalent numbers) to reduce misfires, improve throttle response, and help maintain fuel economy when installed to the correct fitment. Each component is produced under TS16949-certified processes and factory-tested to meet fit and function requirements for the listed vehicles.

How will these coils and plugs improve my car's starting and idle?

Stronger, more consistent spark energy reduces misfires during cold starts and at idle. The coil’s high-purity copper windings and heat-resistant epoxy help maintain steady high-voltage output while iridium electrodes concentrate spark intensity for reliable ignition.

• Improved spark consistency reduces rough idle and stalls.
• Iridium tip and continuous laser weld offer focused, durable sparks.
• High-temp materials prevent coil voltage drop under load.

Will these parts fit my vehicle and install easily?

The kit was engineered as a direct replacement for specific 1.8L models—no custom wiring or adaptors required when matched to the exact year and submodel. Always confirm your Year, Brand, SubModel, Engine Liter and Aspiration before ordering to ensure compatibility.

• Fitment includes Toyota Celica, Corolla, Matrix (1.8L) and related Chevrolet/Pontiac models.
• Direct plug-and-play design follows OEM mounting and connector specs.
• OE cross-reference numbers included for parts matching.

What performance and longevity can I expect from the iridium plugs?

The iridium plugs use a 360° continuous laser-welded center electrode and high-alumina ceramic insulator to provide concentrated sparks and excellent heat resistance. Nickel content and manufacturing controls minimize wear and corrosion, giving long service life under normal driving conditions.

• Durable iridium center electrode resists ablation for extended life (60,000–100,000 miles typical).
• 95% high-alumina ceramic insulator improves thermal stability and insulation.
• Design reduces carbon buildup and promotes more complete combustion.

How does the coil and plug kit affect fuel efficiency and emissions?

By restoring proper ignition timing and consistent spark distribution, the kit helps the engine burn fuel more completely, which can improve drivability and lower unburned fuel that contributes to emissions. Results depend on vehicle condition and driving habits; the parts are designed to meet EPA considerations when properly installed.

• Optimized spark can reduce wasted fuel from misfires.
• Improved combustion helps lower some emissions tied to incomplete burning.
• Designed to match OEM specifications for emission-related fitment.

Who is this for: The KacuYelin UF247 kit is intended for owners or technicians maintaining 1.8L Toyota Celica, Corolla, Matrix and compatible Chevrolet Prizm or Pontiac Vibe models from 1999–2008 who want a cost-effective, OEM-matching replacement. Choose this set if you need a full ignition refresh—coils and plugs together—to address misfires, rough idle, decreased fuel economy, or to complete scheduled maintenance with parts manufactured to industry quality standards.