NGK Laser Platinum Spark Plugs

2011–2026 Chrysler, Dodge, Jeep 6.4L Engines

Part #: 97408

Overview

The NGK Laser Platinum Spark Plugs deliver OEM-grade ignition performance tailored for Chrysler, Dodge, and Jeep vehicles equipped with the 6.4L engine from 2011 through 2026. Designed to meet factory specifications, these spark plugs provide reliable, consistent ignition for high-performance and daily-driven applications alike. Their advanced construction ensures long-lasting durability, stable spark delivery, and efficient combustion, making them an excellent choice for enthusiasts and drivers seeking to maintain optimal engine performance and fuel efficiency.

Ideal for models such as the Dodge Challenger 6.4L 392, Chrysler 300 6.4L 392, Dodge Charger 6.4L 392, Jeep Grand Cherokee 6.4L SRT8/SRT, and Dodge Durango 6.4L 392, these plugs maintain the OEM heat range to preserve engine reliability and performance under demanding conditions.

Key Features

NGK Laser Platinum Spark Plugs incorporate advanced technologies to ensure superior ignition and longevity:

• OEM Heat Range: Matches factory specifications for consistent engine performance and reliability.
• Dual Laser-Welded Platinum Electrodes: Provides extended service life with slow electrode wear and stable spark delivery.
• Fine-Wire Platinum Center Electrode (1.0mm): Enhances ignition efficiency and promotes clean fuel combustion.
• Extended Projection Tip: Improves combustion efficiency and supports smoother idle quality.
• Copper Core: Facilitates rapid heat transfer to prevent engine knock and overheating.
• Pure Alumina Ceramic Insulator: Offers high strength and excellent heat dissipation.
• Anti-Corrosion Trivalent Plating: Protects threads from corrosion and seizing for easier maintenance.
• Triple Seals: Prevent combustion gas leakage under high compression conditions.
• Resistor Design (10k Ohm): Minimizes electrical interference with vehicle electronics.
• Gap: Precisely set at 0.043” (1.1mm) for optimal spark performance.

Construction & Design

NGK’s Laser Platinum Spark Plugs are engineered with a copper core that efficiently transfers heat away from the electrode, reducing the risk of pre-ignition and engine knock. The dual platinum electrodes are laser welded to ensure durability and consistent spark stability over an extended service life. The fine-wire center electrode, measuring just 1.0mm, promotes a more efficient ignition process and cleaner fuel burn, which contributes to smoother engine operation and improved throttle response.

The pure alumina ceramic insulator provides excellent thermal conductivity and mechanical strength, while the trivalent plating on the threads prevents corrosion and seizing, simplifying future removal and replacement. Triple sealing technology ensures no combustion gases escape, maintaining engine efficiency and emission control.

Installation & Fitment

These spark plugs are a direct fit replacement for a wide range of Chrysler, Dodge, and Jeep 6.4L engines from 2011 to 2026, including popular performance models such as the Dodge Challenger 392 and Jeep Grand Cherokee SRT. Installation requires no modifications and follows standard torque specifications: 10.8–18 lb-ft for cast iron cylinder heads and 7.2–14.5 lb-ft for aluminum heads. Proper torque ensures optimal sealing and performance.

What's Included

• Set of 4 NGK Laser Platinum Spark Plugs (OEM Heat Range)

Ideal For

This set is perfect for performance enthusiasts and daily drivers who want to maintain factory-level ignition precision and durability in their Chrysler, Dodge, or Jeep 6.4L engines. Whether you’re restoring OEM performance, replacing worn plugs, or seeking reliable spark plugs for spirited driving, these NGK Laser Platinum plugs offer a balanced combination of longevity, efficiency, and consistent spark quality.

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.