Ignition Coil & Iridium Spark Plugs for Dodge Durango (2004-2005) 5.7L V8

High-Output Ignition Coil & Iridium Spark Plug Kit for 2004-2005 Dodge Durango

What it Does: Replaces deteriorating OEM ignition components to restore proper combustion efficiency, eliminate engine misfires, and provide stable voltage to the 5.7L Hemi cylinder heads.

The Stock Durango Ignition Shortcomings

The factory ignition coils and standard spark plugs on the early 5.7L Hemi are highly susceptible to premature thermal degradation. Positioned directly over the exhaust manifolds, these OE components suffer from severe, repetitive heat soak. Over time, the internal insulating epoxy of the factory coils develops micro-cracks, which increases primary electrical resistance and significantly reduces secondary voltage output. This leads to weak spark propagation, causing rough idling, intermittent misfires under heavy load, unburned fuel washing the cylinder walls, and an active Check Engine Light. Furthermore, standard OE plugs erode rapidly, widening the spark gap and drastically overworking the ignition coils until failure.

The Engineering Solution

This comprehensive ignition overhaul directly mitigates thermal failure and voltage bleed. The upgraded ignition coils are wound with high-purity copper wire and insulated with a robust high-dielectric epoxy, amplifying spark energy and ensuring consistent voltage delivery without arcing. By pairing these coils with enhanced iridium spark plugs, the system utilizes an ultra-fine center electrode that requires less voltage to bridge the gap. Iridium's exceptionally high melting point maintains a precise gap over extended mileage, while its optimized heat range burns off carbon deposits efficiently to prevent fouling. The included spark plug wires ensure the Hemi's unique dual-plug waste-spark system fires in perfect sync, delivering a complete, clean burn.

Technical Specifications

Compatibility

• 2004 Dodge Durango 5.7L V8
• 2005 Dodge Durango 5.7L V8

The Dodge Heavy-Duty Standard

Built to handle the heavy towing and payload demands of a V8 SUV, this upgraded ignition kit restores reliable pulling power, maximizes fuel efficiency, and ensures a smooth, misfire-free idle under all load conditions.