E3 Spark Plugs

11-24 Chrysler 300 /  Dodge Challenger / Charger 5.7L Hemi

E3.68

The E3.68 Automotive Spark Plug is built specifically to meet the performance demands for your vehicle. Engineered with E3's patented DiamondFIRE technology, this spark plug improves combustion efficiency, delivering increased horsepower, better throttle response, reduced fuel consumption, and lower emissions. The unique design features a full-size center electrode and three ground legs that secure the DiamondFIRE tip to the shell, maximizing heat transfer and creating enhanced turbulence in the combustion chamber. With a fixed-gap, 14mm thread diameter, and 1.000" reach gasket seat, the E3.68 ensures consistent and durable performance under real-world driving conditions. Rated for up to 100,000 miles or 5 years, it’s the ideal solution for drivers who demand performance and longevity from their ignition components.

• DiamondFIRE Technology: Patented side-wire design delivers stronger combustion for increased power and fuel efficiency
• Three-Leg Ground Electrode: Secures the tip to the shell for superior heat transfer and durability
• Fixed Spark Gap: Factory-set DiamondFIRE gap eliminates the need for manual adjustment
• Extended Service Life: Built to last 5 years or 100,000 miles under standard driving conditions
• Precise Fit: 14mm thread diameter, 1.000" reach, 5/8" hex size, with gasket seat for secure sealing
• Eco-Friendly Benefits: Reduces hydrocarbon emissions and supports cleaner engine operation

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.