Autolite High Performance Racing Non-Resistor Spark Plug

The ground electrode is cut-back from the center electrode to provide a gap. The face of the ground electrode is concave to provide a constant gap to the center electrode. This plug is designed use in all aftermarket cylinder heads used in different types of racing venues including oval and road racing.

Opens spark face for better ignitability of flame kernel Retains less heat, transfers heat to shell faster - reduces risk of pre-ignition Dyno testing has shown proven power gains Cut-back ground electrode evolved from practice of grinding back the side electrode Electrode Tip Material : Non Resistor Reach : 3/4 In Resistor : Non Resistor Seat Type : Gasket Thread Diameter : 14 mm Tip Configuration : Power Wrench Diameter : 5/8 In