E3 Spark Plugs E3.109 DiamondFIRE Racing Spark Plug 14mm Cold Heat Range

The E3 Spark Plugs E3.109 is a premium racing spark plug engineered for high-performance engines operating at extreme RPMs. This 14mm spark plug features a 0.708-inch reach, 5/8-inch hex, and tapered seat design optimized for racing applications.

Key Features:

• Patented DiamondFIRE ground electrode with dual-leg mounting for superior heat transfer and stability
• Cold heat range specifically designed for high-compression racing engines
• Non-resistor design for maximum spark energy in competition environments
• 14mm thread diameter with 0.708-inch reach and tapered seat
• 5/8-inch hex for easy installation and removal
• Full-size center electrode for extended performance life

The revolutionary DiamondFIRE ground electrode design creates a more efficient flame kernel, resulting in increased power output, reduced fuel consumption, and improved combustion efficiency. The two-leg attachment system provides exceptional stability under high-RPM conditions while ensuring optimal heat dissipation. Ideal for drag racing, circle track, road racing, and other high-performance motorsports applications where reliability and power are critical.