NGK 93420 Spark Plug

Reliable Ignition Performance for Select Dodge and Subaru Models

The NGK Ruthenium HX High Ignitability Spark Plug 93420 is engineered to deliver consistent ignition and improved combustion efficiency. Designed for vehicles such as the Dodge Charger, Subaru WRX, and other compatible models, this spark plug supports optimal engine performance under various driving conditions.

• Ruthenium center electrode tip for enhanced ignitability
• Projected square platinum ground electrode for stable spark
• Copper core materials in both center and ground electrodes for efficient heat dissipation
• Standard ground configuration with a single ground electrode
• Non-removable nut electrical terminal for secure connection
• Pre-gap size of 0.032 inches for precise spark gap
• Flat seat type with 14mm thread diameter and 26.5mm reach
• Manufacturer heat range rating of 6 suitable for a range of engine conditions

About the Ruthenium HX High Ignitability Spark Plug Line

The Ruthenium HX High Ignitability Spark Plug line by NGK focuses on delivering improved ignition performance through advanced electrode materials and design. The use of ruthenium on the center electrode tip enhances spark efficiency and durability, while the projected square platinum ground electrode supports stable ignition. This combination is intended to provide reliable starts and consistent combustion in compatible vehicles.

Technical Details and Compatibility

This spark plug features a copper core in both the center and ground electrodes, which aids in effective heat transfer and durability. The projected square platinum ground electrode design contributes to high ignitability, making it suitable for engines requiring precise spark timing. With a 5/8 inch hex size and a flat seat, the NGK 93420 spark plug fits a variety of models including Dodge Ram 1500, Subaru Impreza, Hyundai Genesis Coupe, and Mercedes-Benz CL55 AMG among others.

Common Applications and Problem Solving

• Improves ignition reliability in Dodge Charger and Jeep Grand Cherokee engines
• Reduces misfires and rough idling in Subaru WRX and Forester models
• Enhances cold start performance for Hyundai and Mitsubishi vehicles
• Supports consistent combustion in Mercedes-Benz and Land Rover engines
• Helps maintain fuel efficiency and engine responsiveness in Volvo and Saab cars

Installation Notes and Tips

Ensure the spark plug gap is set to the specified pre-gap size of 0.032 inches before installation. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specifications to avoid damage to the threads or seat. The non-removable nut terminal requires compatible ignition wiring connectors. Always verify compatibility with your vehicle’s make and model prior to installation.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards for durability and performance. The Ruthenium HX High Ignitability Spark Plug 93420 undergoes rigorous testing to ensure consistent ignition and heat range compliance. Please refer to NGK’s warranty policy for coverage details related to manufacturing defects.