Ignition Coil & Iridium Spark Plugs for Chrysler 300 (2005-2022) 5.7L 6.1L 6.4L V8

High-Performance Ignition Coils & Iridium Spark Plugs for 2005-2022 Chrysler 300 (5.7L Hemi / LX/LD)

Replaces degraded factory ignition components to restore optimal spark timing, resolve misfires, and maximize fuel burn efficiency.

The Stock Hemi Ignition Weakness

The 5.7L Hemi V8 dual-spark plug design is highly demanding on ignition components. Over time, OEM coil packs succumb to heat soak from the cast-iron block and aluminum heads, degrading the internal epoxy and copper windings. This thermal breakdown causes inconsistent voltage, manifesting as a rough idle, hesitation under heavy load, and P0300-series misfire codes. Furthermore, standard plugs wear their electrodes rapidly under high combustion pressures, widening the spark gap and delaying the critical flame front propagation required for complete cylinder detonation.

The Engineering Solution

This ignition kit upgrades Hemi spark delivery utilizing high-grade materials. The performance coils feature premium silicone boots that resist thermal brittleness and prevent voltage arcing. Internal primary and secondary copper windings are engineered for higher kilovolt (kV) output and rapid recharge times, ensuring a potent spark even at high RPMs. Paired with 16 iridium spark plugs—two per cylinder as required by the Hemi architecture—the ultra-fine center electrodes maintain a precise gap over a significantly extended lifespan. This combination promotes a highly concentrated spark that vaporizes fuel efficiently, stabilizing idle, recovering lost horsepower, and improving low-end throttle response.

Technical Specifications

Compatibility

• 2005-2022 Chrysler 300 5.7L V8
• 2005-2022 Chrysler 300 6.1L V8
• 2005-2022 Chrysler 300 6.4L V8
• Interchange Part Numbers: CUF504, UF-504, UF504, 7805-1355, 7805-8103, 2505-302202, 5C1569, 302202, 2505-302202, C1526, E1004, 50090, 52-1828, GN10352, CLS1087, 56029129AA, 56029129AB, 56029129AF, 68060346AA

The Chrysler Muscle Standard

Designed for the heavy-hitting demands of modern American muscle, this ignition overhaul ensures your Hemi delivers uncompromised power, aggressive throttle response, and robust daily reliability.