KacuYelin UF230 Ignition Coil Pack & 8 Iridium Spark Plugs Kit — 4.3/4.7L V8 Fit, OEM Match for Toyota Lexus

The KacuYelin UF230 ignition coil pack and set of 8 iridium spark plugs are a matched replacement kit designed to restore consistent spark, improve throttle response, and support reliable starts for 4.3L and 4.7L V8 Toyota and Lexus engines.

This complete ignition kit pairs high-purity copper-wound coil packs with long-life iridium spark plugs engineered to match OEM fit and electrical specs for many Toyota Tundra, Sequoia, Land Cruiser, 4Runner and Lexus V8 models. Built in TS16949-certified facilities and engineered with durable materials—silicon steel cores, high-temperature epoxy, 95% alumina ceramics, and laser-welded iridium electrodes—this set aims to reduce misfires, stabilize idle, and help maintain fuel efficiency when installed as a direct replacement.

Which vehicles will this KacuYelin kit fit?

This kit covers multiple Toyota and Lexus V8 applications from the late 1990s through 2010. Confirm year, submodel and engine displacement when ordering to ensure compatibility.

• 2000–2009 Toyota Tundra 4.7L V8
• 2001–2009 Toyota Sequoia 4.7L V8
• 1998–2007 Toyota Land Cruiser LX470 4.7L V8, 2003–2009 4Runner 4.7L V8
• 2001–2007 Lexus GS430, 2001–2006 LS430, 2002–2010 SC430 (4.3L V8), 2003–2009 GX470 (4.7L V8)

How do the coil packs improve ignition performance?

KacuYelin coil packs use high-purity copper windings and silicon steel cores to deliver a stable high-voltage output under load. The materials and high-temp epoxy resist oxidation and heat, helping reduce ignition failures and inconsistent spark delivery over time.

• German-imported copper windings for efficient current transfer
• Silicon steel core and epoxy for thermal and corrosion resistance
• OE cross-reference numbers included for easy verification (UF230, UF493, C1173, IC336, 5C1196)

What benefits do the iridium spark plugs provide?

The iridium plugs are manufactured with a continuous 360° laser-welded center electrode and high nickel content, balancing longevity with consistent spark formation. High-density alumina ceramic insulators maintain insulation at high temperatures while precise electrode geometry supports cleaner combustion.

• Laser-welded iridium electrode for focused, reliable sparks
• Up to 60,000–100,000 miles expected service life in typical conditions
• High alumina ceramics (95%) for improved heat tolerance and insulation

Will this kit affect fuel economy or emissions?

When installed correctly, matched ignition components can help restore lost efficiency by reducing misfires and incomplete combustion. KacuYelin states potential fuel efficiency improvements and lower emissions versus degraded ignition parts, while meeting EPA-related expectations when the rest of the engine is in good repair.

• Optimized spark timing and strength may reduce carbon buildup
• Improved combustion stability can help MPG recovery
• Direct plug-and-play replacement helps preserve factory engine calibration

Who is this for: This kit is intended for owners and mechanics maintaining Toyota and Lexus vehicles with 4.3L or 4.7L V8 engines who need a full ignition refresh—especially those experiencing misfires, hard starts, rough idle, or reduced throttle response from worn coils or plugs. It is also suited for DIY installers who want an OEM-compatible replacement from a manufacturer operating under TS16949 quality standards. Always verify fitment with your vehicle details before purchase and follow torque and gap specifications during installation.