E3 Spark Plugs

11-26 Ram / Durango / Jeep Grand Cherokee 5.7L Hemi

14-26 Ram 6.4L 392 2500 / 3500

E3.68

The E3.68 Automotive Spark Plug is engineered specifically for engines, making it an ideal performance upgrade for vehicle. Designed with E3’s patented DiamondFIRE electrode technology, this plug delivers a stronger, more complete spark for enhanced combustion efficiency. The three-leg grounding design not only secures the DiamondFIRE electrode to the shell but also improves heat transfer and increases turbulence in the combustion chamber. The result is improved power, reduced fuel consumption, lower hydrocarbon emissions, and longer plug life. With a 14mm thread diameter, 1.000" thread reach, and a gasket seat, the E3.68 is made for precise fitment and consistent performance. The 5/8" hex size allows easy installation, and the fixed gap design ensures reliable spark delivery without adjustment. Built with a resistor to suppress interference, the E3.68 is guaranteed to last 100,000 miles or 5 years.

Electrode Design:

• DiamondFIRE patented technology
• Three-legged ground electrode improves combustion and heat dissipation
• Creates turbulence in the cylinder for a stronger, more efficient burn

Performance Benefits:

• Increases horsepower and throttle response
• Improves fuel efficiency
• Reduces emissions
• Enhances cold starts and ignition reliability

Technical Specs:

• Thread Diameter: 14mm
• Thread Reach: 1.000"
• Seat Type: Gasket
• Hex Size: 5/8"
• Tip/Gap: Fixed, DiamondFIRE (non-adjustable)
• Resistor: Yes

Durability:

• Guaranteed for 5 years or 100,000 miles

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.