NGK 1-Step Colder Iridium Spark Plugs (Supercharged or Nitrous): Chrysler / Dodge / Jeep 5.7L Hemi 2005 - 2008

NGK 1-Step Colder Iridium Spark Plugs (Supercharged or Nitrous)

05-08 Chrysler / Dodge / Jeep 5.7L Hemi

2314

NGK 1-Step Colder Iridium Spark Plugs are engineered for high-performance engines equipped with forced induction or nitrous. The colder heat range helps control combustion temperatures, reducing pre-ignition and detonation often associated with boosted setups. A fine 0.6mm iridium electrode provides a precise, concentrated spark for efficient combustion, cleaner burn, and improved throttle response under load.

Built with NGK’s high-strength copper core and alumina ceramic insulator, these plugs deliver excellent heat transfer, durability, and stability at high RPM. Trivalent plating protects against corrosion and thread seizure, while triple-seal construction prevents gas leakage. The extended-projection design enhances flame travel, making these plugs ideal for aggressive performance tuning and demanding driving environments.

• 1-Step Colder Heat Range for boosted or nitrous-assisted engines
• Fine-Wire 0.6mm Iridium Electrode for stronger, more stable spark
• Copper Core ensures efficient heat dissipation and detonation resistance
• Extended-Projection Design improves combustion efficiency
• Alumina Ceramic Insulator provides strength and heat management
• Trivalent Anti-Corrosion Plating prevents seizing and rust
• Triple-Seal Construction stops combustion gas leakage
• Resistor Plug (5k Ohm) reduces electrical interference
• Gap: .050" (1.3mm)
• Heat Range: 5

Torque Specs:

• Cast Iron Heads: 10.8–18 lb-ft
• Aluminum Heads: 7.2–14.5 lb-ft
• Longevity: Approx. 50,000 miles (performance use may vary)
• Quantity: Sold individually
• Warranty: 60 days