NGK 2-Step Colder Iridium Spark Plugs (Supercharged or Nitrous): Chrysler / Dodge / Jeep 5.7L Hemi 2005 - 2008

NGK 2-Step Colder Iridium Spark Plugs (Supercharged or Nitrous)

05-08 Chrysler / Dodge / Jeep 5.7L Hemi

2315

NGK 2-Step Colder Iridium Spark Plugs are engineered for engines operating under extreme boost, high cylinder pressures, or heavy nitrous use. The colder heat range helps manage combustion chamber temperatures to prevent detonation, pre-ignition, and spark blow-out while maintaining precise ignition control.

Featuring a precision 0.6mm iridium center electrode, these plugs generate a strong, concentrated spark for efficient combustion and improved throttle response. A robust copper core and alumina ceramic insulator deliver excellent heat transfer and durability in demanding performance environments. Anti-corrosion trivalent plating and triple-seal design ensure long-term reliability and leak-free operation under harsh conditions.

Ideal for dedicated high-output builds, performance tuning, and competition settings where maximum temperature control and spark stability are critical.

• 2-Step Colder Heat Range ideal for high-boost supercharged & nitrous applications
• Fine-Wire 0.6mm Iridium Electrode ensures strong, stable ignition spark
• Extended Projection Tip improves flame travel and combustion efficiency
• Copper Core enhances heat removal and prevents detonation
• High-Strength Alumina Ceramic Insulator withstands extreme combustion temps
• Triple-Seal Design prevents combustion gas leakage
• Corrosion-Resistant Trivalent Plating prevents thread seizure and rust
• Resistor Plug (5k Ohm) minimizes electrical interference
• Gap: .050" (1.3mm)
• Heat Range: 6 (2-steps colder than stock)

Torque Specs:

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