Ignition Coil and Iridium Spark Plugs for Kia Optima (2006-2010) 2.7L
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Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2006-2010 Kia Optima
What it Does: Replaces degraded factory ignition coils and worn plugs with high-dielectric coil-on-plug assemblies and fine-wire iridium spark plugs to restore precise spark timing and eliminate cylinder misfires.
The Stock Optima Ignition Breakdown
Over extended heat cycles within the transverse engine bay of the 2.7L V6, the factory secondary ignition coil boots and primary copper windings suffer thermal fatigue. Micro-fractures develop in the epoxy casing, leading to voltage leakage, high-RPM spark blowout, rough idle, and typical P0300-P0306 misfire trouble codes. Paired with aged, eroded standard nickel or platinum plugs with wide gaps, the increased resistance stresses the primary ignition circuit, resulting in incomplete combustion, sluggish throttle response, and unburned hydrocarbon buildup in the catalytic converters.
The Engineering Solution
This comprehensive ignition service kit restores factory combustion efficiency. The six ignition coils feature high-conductivity internal copper windings insulated with premium thermoset epoxy to prevent internal arcing and dielectric breakdown under extreme thermal loads. Reinforced silicone boots resist oil degradation and flashover. The accompanying six iridium spark plugs feature a laser-welded, fine-wire center electrode that requires lower firing voltage, promotes faster flame kernel propagation, and maintains exact gap tolerances for high-temperature durability.
Technical Specifications
| Fitment | 2006-2010 Kia Optima 2.7L V6 |
| Engine / Chassis | 2.7L Mu G6EA / MG Chassis |
| Stock Output | 185 hp / 182 lb-ft (Approx) |
| Part Number | UF558, UF-558, 27301-3E400 |
Compatibility
- 2006 Kia Optima 2.7L V6 (MG Chassis)
- 2007 Kia Optima 2.7L V6 (MG Chassis)
- 2008 Kia Optima 2.7L V6 (MG Chassis)
- 2009 Kia Optima 2.7L V6 (MG Chassis)
- 2010 Kia Optima 2.7L V6 (MG Chassis)
The Kia Commuter Reliability Standard
Engineered for exact OEM pin-to-pin fitment, this kit restores smooth idle stability, crisp throttle modulation, and complete combustion cycles without trigger wheel calibration or ECU fault codes.
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