Ignition Coil & Iridium Spark Plugs for Jeep Wagoneer Grand Wagoneer (2022) 5.7L 6.4L V8

High-Output Ignition Coil & Iridium Spark Plugs for Jeep Wagoneer, Grand Wagoneer (Hemi V8 / WS)

Direct replacement ignition coil and iridium spark plug bundle designed to eliminate misfires, enhance throttle response, and optimize fuel burn for the 5.7L and 6.4L Hemi engines.

The Stock Wagoneer, Grand Wagoneer Ignition Degradation

The OEM 5.7L and 6.4L Hemi ignition systems are notorious for degrading over time under heavy thermal loads, especially when subjected to prolonged towing, stop-and-go traffic, or the frequent cycling of the eTorque hybrid system. As the factory coils age, internal windings break down, leading to voltage leaks and weak spark delivery. Simultaneously, standard factory spark plugs experience accelerated electrode wear, widening the gap beyond specification. This results in sluggish throttle response, random cylinder misfires, unburnt fuel washing the cylinder walls, and a noticeable drop in towing capability. For the heavy WS chassis, these inefficiencies compound, severely degrading lower-RPM torque and overall drivability.

The Engineering Solution

This complete ignition overhaul addresses Hemi-specific thermal degradation by utilizing upgraded epoxy resins and heavy-duty primary and secondary copper windings in the coils to ensure maximum dielectric strength and thermal shock resistance. Higher voltage output ensures a complete burn of the air-fuel mixture, crucial for the dual-spark-plug cylinder head design. Paired with 16 performance iridium spark plugs, the system delivers an ultra-fine center electrode that requires less firing voltage while providing a highly concentrated, stable spark. The iridium construction offers exceptional resistance to heat and electrical wear, preventing gap expansion over time. This synergy restores lost horsepower, stabilizes idle, improves fuel efficiency, and provides the consistent ignition needed for heavy payloads.

Technical Specifications

Compatibility

• 2022 Jeep Wagoneer 5.7L V8
• 2022 Jeep Grand Wagoneer 6.4L V8

The Jeep Durability Standard

Built to handle the immense weight and towing demands of the modern WS platform, this ignition upgrade ensures your Hemi V8 maintains relentless pulling power, reliable cold starts, and uncompromised off-road or highway capability under extreme thermal conditions.