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

11-25 Chrysler / Dodge / Ram / Jeep 6.4L 392 & 6.2L Hellcat

2309

NGK 1-Step Colder Iridium Spark Plugs provide enhanced reliability for performance engines running elevated boost or nitrous. Featuring a fine-wire 0.6mm iridium electrode and a colder heat range, these plugs help control heat in extreme combustion environments, reducing the risk of detonation and pre-ignition while maintaining a strong, efficient spark. Built for high-stress performance use, these plugs utilize a copper core for superior heat transfer, a pure alumina ceramic insulator for strength and temperature stability, and corrosion-resistant trivalent plating to prevent thread seizure. Triple-seal construction prevents gas leakage, while the projected-tip design promotes better fuel burn and throttle response. Perfect for high-horsepower street and competition setups demanding consistency and durability.

• 1-Step Colder Heat Range for boosted and nitrous-assisted high-output engines
• Fine-Wire 0.6mm Iridium Electrode for precise, consistent spark delivery
• Copper Core ensures efficient heat removal under extreme load
• Projected-Tip Design enhances combustion and throttle response
• Pure Alumina Ceramic Insulator supports high-temperature stability and strength
• Triple-Seal Construction eliminates combustion gas leakage
• Anti-Corrosion Trivalent Plating prevents galling and seizing
• Taper-Cut Ground Electrode promotes efficient flame propagation
• Resistor Plug (5k Ohm) reduces electrical interference
• Gap: .031" (0.8mm)
• Heat Range: 7

Torque Specs:

• Cast Iron: 18–25.3 lb-ft
• Aluminum: 18–21.6 lb-ft
• Longevity: ~50,000 miles (usage dependent)
• Quantity: Sold individually
• Warranty: 60 days

NGK is one of the most trusted names in ignition, supplying spark plugs, coils, and related ignition/sensor components used across both OEM and aftermarket applications. For performance enthusiasts, NGK’s plug technology and broad coverage make it a reliable baseline upgrade for consistent spark, cleaner burn, and dependable operation under heat and boost.