Ignition Coil and Iridium Spark Plugs for Kia Stinger (2018-2020) 2.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2018-2020 Kia Stinger (CK)

What it Does: The ignition coil and iridium spark plug kit replaces degraded factory ignition components on the 2018-2020 Kia Stinger to eliminate boost-induced misfires, stabilize idle, and restore consistent combustion efficiency.

The Stock Kia Stinger Thermal Breakdown

Forced-induction direct injection creates severe combustion chamber pressures that place extreme electrical loads on the secondary ignition system. Over time, thermal cycling within the cramped CK engine bay degrades the factory coil epoxy insulation, resulting in internal dielectric breakdown and spark leakage. Compounding the issue, high-mileage spark plug electrodes suffer gap erosion, increasing electrical resistance. When running high boost, the OEM ignition coils fail to deliver adequate ionization voltage across widened gaps, triggering P0300-P0304 DTC codes, hesitation during tip-in, and degraded fuel economy.

The Engineering Solution

This comprehensive tune-up kit restores ignition system performance using four direct-replacement coil-on-plug units paired with precision fine-wire iridium spark plugs. The ignition coils feature high-temperature epoxy-filled windings, integrated ferrite cores to suppress RFI/EMI, and heat-stabilized silicone boots that isolate secondary voltage up to factory thermal thresholds. Each iridium plug incorporates a laser-welded fine-wire center electrode, requiring significantly lower firing voltage than nickel-copper alternatives while retaining structural integrity under boost. Designed to fit the Theta II G4KL engine, this matched configuration delivers reliable arc propagation and consistent ignition timing across all cylinders.

What's Included

• 4x Black Ignition Coils (Coil-on-Plug)
• 4x Fine-Wire Iridium Spark Plugs

Technical Specifications

Compatibility

• 2018-2020 Kia Stinger 2.0L Turbocharged Inline-4 (RWD / AWD)

Frequently Asked Questions & Fitment Warnings

Does this fit the CK Stinger?

Yes, this is a direct fit for the 2018-2020 Kia Stinger equipped with the Theta II G4KL 2.0L Turbo engine. This kit does not fit the 3.3L twin-turbo V6 (Lambda II) platform.

Do the spark plug boots require dielectric grease during installation?

A light application of dielectric grease inside the boot base is recommended to prevent moisture intrusion and eliminate terminal boot binding on the plug ceramic.

The Kia Calibration

Engineered to withstand the demanding thermal profiles of modern turbocharged sport sedans, these ignition components maintain tight factory resistances to protect sensitive ECU driver circuits without throwing check engine lights.