NGK 97408 Spark Plug

NGK Laser Platinum Spark Plug Overview

The NGK Laser Platinum Spark Plug 97408 is engineered for reliable ignition performance in select Chrysler, Dodge, and Jeep vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Part Number: 97408 (Lztr6ap11eg)
• Compatible with Chrysler 300, Dodge Challenger, Charger, Durango, Jeep Grand Cherokee, Grand Wagoneer, and Wrangler
• Center electrode tip made of platinum for enhanced durability
• Copper core in both center and ground electrodes for optimal conductivity
• Standard ground electrode tip and configuration
• Pre-gap size of 0.044 inches for precise spark delivery
• Non-removable nut electrical terminal type
• Tapered seat type with 14 mm thread diameter and 25 mm reach
• Hex size of 5/8 inch for installation with common tools
• Manufacturer heat range rating of 6

About the NGK Laser Platinum Spark Plug Line

The Laser Platinum Spark Plug line from NGK features platinum-tipped center electrodes designed to provide longer service life and stable ignition performance. This product line balances durability and efficiency, making it suitable for vehicles requiring consistent spark quality under various driving conditions. The 97408 spark plug benefits from this technology, offering reliable ignition for compatible Chrysler, Dodge, and Jeep models.

Technical Details and Features

This NGK spark plug incorporates a copper core in both the center and ground electrodes, which enhances electrical conductivity and heat dissipation. The platinum center electrode tip improves wear resistance, extending the service interval compared to conventional plugs. The single ground electrode with a standard tip design ensures stable spark formation. The pre-gap size of 0.044 inches is factory set to optimize ignition timing and combustion efficiency. The tapered seat and 14 mm thread diameter provide a secure fit in the engine cylinder head, while the 25 mm reach ensures proper positioning within the combustion chamber.

Applications and Problem Solving

• Restores proper ignition in Chrysler 300, Dodge Charger, and Jeep Wrangler engines
• Reduces misfires and rough idling caused by worn spark plugs
• Improves fuel efficiency by maintaining consistent spark delivery
• Helps prevent hard starting issues in compatible vehicles
• Supports stable engine performance under varied driving conditions

Installation Notes and Tips

• Use a 5/8 inch socket wrench for installation or removal
• Verify the pre-gap size before installation; adjust only if necessary
• Apply anti-seize compound sparingly on threads to prevent galling
• Torque to manufacturer specifications to avoid damage to the tapered seat
• Ensure the electrical terminal is properly connected for reliable ignition

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring consistent performance and durability. The Laser Platinum Spark Plug 97408 undergoes rigorous testing for heat range, electrode wear, and electrical resistance (10,000 ohms) to maintain ignition reliability. While specific warranty details may vary, NGK products typically come with a limited warranty covering defects in materials and workmanship.