E3 Spark Plugs

15-22 6.2L Hellcat / Demon / Trackhawk

E3.74

The E3.74 Automotive Spark Plug is a high-performance ignition solution designed for vehicle engine. Built to handle the intense pressures and heat of high-horsepower applications, the E3.74 incorporates E3’s patented DiamondFIRE electrode technology to optimize combustion and spark efficiency. The three-leg ground electrode design ensures maximum stability and superior heat transfer, creating more turbulence in the combustion chamber for a faster flame front and more complete fuel burn. This results in increased horsepower, improved throttle response, reduced fuel consumption, and lower emissions—critical for both performance and efficiency in high-output engines. The E3.74 features a 14mm thread diameter, 1.000” reach, and a tapered seat for secure, high-pressure sealing. With a fixed DiamondFIRE gap, 5/8" hex, and resistor for radio interference suppression, it installs easily and lasts long, offering up to 100,000 miles or 5 years of dependable service in even the most demanding environments.

Advanced Electrode Design:

• DiamondFIRE Side Wire for faster, stronger combustion
• Triple-leg ground electrode for structural strength and superior heat transfer
• Fixed, factory-set gap for consistent performance

Performance Benefits:

• Increases horsepower and acceleration
• Enhances combustion efficiency
• Improves fuel economy
• Lowers hydrocarbon emissions
• Ideal for high-performance and forced induction engines

Technical Specifications:

• Thread Diameter: 14mm
• Thread Reach: 1.000"
• Seat Type: Taper
• Hex Size: 5/8"
• Tip/Gap: Fixed DiamondFIRE (Non-Adjustable)
• Resistor: Yes

Longevity:

• Backed by a 5-Year / 100,000-Mile Warranty

E3 Spark Plugs uses its patented DiamondFIRE design to target efficient combustion and consistent ignition performance across automotive and racing applications. For performance builds, a quality spark plug choice can support clean burn characteristics and reliability—especially when tuning for higher cylinder pressures or more demanding driving conditions.