Ignition Coil & Iridium Spark Plugs for Dodge Ram 1500 2500 3500 4000 (2005-2010) 5.7L V8

High-Output Ignition Coil & Iridium Spark Plugs for 2005-2010 Dodge Ram 1500, 2500, 3500 (5.7L HEMI V8 / DR/DS)

Upgrades the factory ignition system with performance-grade ignition coils and dual iridium spark plugs to eliminate misfires and restore optimal combustion in the 5.7L HEMI engine.

The Stock Ram 1500, 2500, 3500 Ignition System Weaknesses

The 5.7L HEMI V8 demands robust spark delivery due to its unique dual-spark-plug cylinder head design. Over time, OEM copper-core spark plugs degrade rapidly, expanding the plug gap and forcing the factory ignition coils to work exponentially harder to bridge the gap. This excessive electrical strain causes thermal breakdown within the coil's internal primary windings and degrades the surrounding epoxy. The result is a weak spark, intermittent misfires under heavy load, compromised fuel economy, and a noticeable drop in towing performance. Heat soak from the cast iron block further accelerates the deterioration of the factory coil boots, leading to spark arcing against the cylinder head and rough idling conditions.

The Engineering Solution

This comprehensive ignition overhaul kit addresses the inherent weaknesses of the stock HEMI ignition architecture. The 16x Iridium spark plugs replace standard copper components with a fine-wire iridium center electrode, drastically lowering the voltage required to fire while maintaining a stable gap over an extended lifespan. The accompanying 8x performance ignition coils feature upgraded primary and secondary copper windings encapsulated in high-dielectric epoxy. This ensures maximum voltage output and thermal stability, mitigating misfires under high cylinder pressures. By producing a hotter, more consistent spark across both plugs per cylinder, this kit ensures a complete fuel burn, unlocking restored torque for heavy towing and improving overall throttle response.

Technical Specifications

Compatibility

• 2006-2010 Dodge Ram 1500 5.7L V8
• 2006-2010 Dodge Ram 2500 5.7L V8
• 2006-2009 Dodge Ram 3500 5.7L V8
• 2005-2010 Dodge Ram 4000 5.7L V8 (Mexico / International)

Built for Heavy-Duty Ram Demands

Built to endure the grueling demands of heavy payloads and rigorous towing schedules. This ignition upgrade is designed to ensure your Ram maintains the rugged dependability required for the job site or the trail, ensuring consistent power delivery mile after mile.

Common Questions

What comes in this ignition kit for the 5.7L HEMI?
The kit includes 8 high-output ignition coils and 16 fine-wire iridium spark plugs—enough to service all 8 cylinders on the dual-plug 5.7L HEMI V8 engine.

Which Dodge Ram 5.7L V8 trucks does this UF504 kit fit?
It fits 5.7L HEMI V8 models equipped with factory UF504 dual-boot coil-on-plug ignition, covering 2006-2010 Dodge Ram 1500 and 2500, 2006-2009 Dodge Ram 3500, and 2005-2010 Mexico-market Dodge Ram 4000 trucks.

Will this fit a 2005 US-market Dodge Ram 1500 with spark plug wires running across the valve covers?
This kit is built for 5.7L HEMI engines that use the UF504 direct coil-on-plug design (OEM 56029129AA / 68060346AA) where each coil sits directly over both spark plugs on the same cylinder without secondary plug wires.

Which OEM and aftermarket part numbers does this coil set replace?
The ignition coils directly replace part numbers UF504, 5C1569, C1526, GN10352, 56029129AA, and 68060346AA.

Why does the kit include 16 spark plugs for an 8-cylinder truck?
The 5.7L HEMI V8 cylinder head uses a dual-spark-plug architecture with two spark plugs per cylinder, requiring 16 spark plugs and 8 dual-output ignition coils for a complete tune-up.