DiamondFIRE .56 Spark Plug

The E3.56 Automotive Spark Plug is a 14mm plug designed with a 0.750-inch reach and a gasket seat, suitable for a wide variety of late-model applications, particularly imports. This spark plug incorporates E3's patented DiamondFIRE technology, featuring three legs that secure the electrode to the shell. This construction facilitates superior heat transfer and enhances turbulence within the cylinder. Built for optimal performance, the E3.56 utilizes a unique ground electrode and a full-size center electrode. It is guaranteed to provide reliable performance for five years or 100,000 miles. The plug is a resistor type with a fixed gap that cannot be adjusted, and has a 5/8" hex size.