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)

06-10 Chrysler / Dodge / Jeep 6.1L SRT8

2314

NGK 1-Step Colder Iridium Spark Plugs are precision-engineered for engines running forced induction or nitrous systems, where higher combustion temperatures demand superior spark stability and thermal control. The ultra-fine 0.6mm iridium electrode delivers a strong, concentrated spark for efficient combustion, while the colder heat range helps reduce the risk of knock and pre-ignition in high-pressure environments. Built with a copper core for efficient heat transfer, an alumina ceramic insulator for durability, and trivalent plating for corrosion resistance, these plugs deliver longevity and reliable operation under aggressive tuning conditions. Triple-seal construction ensures no combustion gas leakage, and the extended-projection design promotes clean burn and optimal performance at elevated power levels. Ideal for serious street-performance and motorsport applications.

• 1-Step Colder Heat Range for boosted and nitrous builds
• Ultra-fine 0.6mm Iridium Electrode improves spark strength and combustion efficiency
• Copper Core optimizes heat removal and detonation control
• Extended Projection Design enhances ignition stability and throttle response
• Triple-Sealed Construction prevents combustion gas leakage
• Anti-Corrosion Trivalent Plating resists seizing and harsh conditions
• Resistor Plug (5k Ohm) reduces electrical interference
• Tapered Seat with 14mm thread / 1.25mm pitch
• Gap: .050" (1.3mm)
• Heat Range: 5

Torque Specs:

• Cast Iron: 10.8–18 lb-ft
• Aluminum: 7.2–14.5 lb-ft
• Longevity: ~50,000 miles (usage dependent)
• Quantity: Sold individually
• Warranty: 60 days