Ignition Coil & Iridium Spark Plugs for Ram 2500 3500 4500 5500 (2011-2022) 5.7L 6.4L V8

High-Output Ignition Coil & Iridium Spark Plugs for 2011-2022 Dodge, Ram 2500, 3500, 4500, 5500 (5.7L / 6.4L HEMI V8)

Designed to restore combustion efficiency and maximize voltage output under heavy loads. This complete 8-coil and 16-plug package replaces degrading OEM ignition components to eliminate misfires, stabilize idle, and optimize fuel burn across the RPM range.

The Stock Ram HEMI Ignition Degradation

The 5.7L and 6.4L HEMI V8 engines utilize a dual-spark plug system that demands consistent, high-voltage energy delivery. Over prolonged heat cycling, heavy towing, and extended idle times typical of heavy-duty truck usage, the factory ignition coils suffer from primary winding resistance breakdown and epoxy insulation cracking. Simultaneously, standard copper or platinum spark plugs experience rapid electrode erosion under high cylinder pressures. This progressive wear leads to parasitic voltage leaks, weak spark propagation, intermittent misfires under load, and reduced towing efficiency. The resulting incomplete combustion directly penalizes fuel economy and low-end torque output.

The Engineering Solution

This comprehensive ignition overhaul directly addresses the HEMI heat-soak and voltage drop issues. The included performance ignition coils are engineered with advanced conductive copper windings and high-dielectric epoxy resin, ensuring maximum thermal shock resistance and a stable, high-voltage output even during sustained high-load towing operations. Paired with 16 performance iridium spark plugs, the system guarantees a highly concentrated spark arc. The ultra-fine iridium center electrodes require less voltage to fire, significantly reducing the load on the ignition coils while ensuring complete fuel atomization. This combination yields a more complete fuel burn, restoring factory horsepower and torque metrics, eliminating rough idles, and providing superior throttle response in heavy-duty applications.

Technical Specifications

Compatibility

• 2011-2022 Ram 2500 (5.7L & 6.4L V8)
• 2011-2022 Ram 3500 (5.7L & 6.4L V8)
• 2011-2022 Ram 4500 (5.7L & 6.4L V8)
• 2011-2022 Ram 5500 (5.7L & 6.4L V8)

The Ram Heavy Duty Standard

Engineered for the rigorous demands of the modern job site and heavy towing circuits. Upgrading to a high-output iridium ignition system ensures long-term reliability, maximum pulling power, and consistent combustion stability no matter how heavy the payload.