NGK 3993 Spark Plug

NGK Racing Spark Plug 3993 Overview

The NGK Racing Spark Plug 3993 is engineered for performance applications requiring reliable ignition and consistent spark delivery. Designed with durable materials and precise specifications, this spark plug supports efficient combustion in various automotive engines.

• Resistance: 5000 ohms for optimal electrical performance
• Ground Electrode Tip Design: Standard for consistent spark gap
• Center Electrode Core Material: Copper for enhanced conductivity
• Ground Electrode Core Material: Nickel for durability
• Pre-Gap Size: 0.024 inches for precise ignition timing
• Hex Size: 13/16 inch for standard installation tools
• Manufacturer Heat Range: 10 suitable for high-performance engines
• Seat Type: Flat for secure sealing
• Thread Diameter: 14 mm with 0.75 inch reach
• Electrical Terminal Type: Non-removable nut for stable connection

Detailed Product Description

The NGK Racing Spark Plug 3993 features a copper core center electrode that enhances thermal conductivity and electrical performance, ensuring efficient spark generation. The nickel ground electrode and tip provide durability under high-temperature conditions common in racing and performance driving. With a resistance of 5000 ohms, this spark plug helps reduce electromagnetic interference while maintaining reliable ignition. The pre-gap size of 0.024 inches is factory set to optimize combustion efficiency and engine responsiveness. Its flat seat design ensures a proper seal in compatible cylinder heads, while the 13/16 inch hex size allows for easy installation using standard tools.

Part of NGK's Racing Spark Plug line, this model is tailored for motorsport and high-performance applications where consistent ignition and heat management are critical. The heat range of 10 indicates suitability for engines that operate at higher temperatures, helping prevent fouling and pre-ignition.

Applications and Problem Solving

• Improves ignition reliability in high-performance and racing engines
• Reduces misfires caused by electrode wear or improper gap
• Helps prevent fouling in engines with aggressive tuning
• Minimizes electromagnetic interference affecting engine sensors
• Supports stable combustion under elevated engine temperatures

Installation Notes and Tips

Ensure the spark plug gap is checked before installation, although the pre-gap is factory set at 0.024 inches. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specifications to avoid damage to the threads or cylinder head. The 13/16 inch hex size fits standard spark plug sockets. The non-removable nut terminal type requires compatible ignition wire connectors. Always verify compatibility with your vehicle’s make and model before installation.

Quality Assurance

NGK Racing Spark Plug 3993 is manufactured to meet strict quality standards for performance and durability. The use of copper and nickel materials ensures long service life under demanding conditions. While no specific warranty information is provided, NGK products are generally backed by the manufacturer’s quality control processes to ensure reliability in automotive ignition systems.