AUTOLITE AR13501 Spark Plug; Racing; Non Resistor; Copper; Nickel Electrode Tip; Standard Length; 0.551 Inch Thread Diameter; 0.433 Inch Thread Reach; 5/8 Inch Hex; Tapered Seat; 0.025 Inch Gap; Single
Non Resistor Copper Nickel Electrode Tip Standard Length 0.551 Inch Thread Diameter 0.433 Inch Thread Reach 5/8 Inch Hex Tapered Seat 0.025 Inch Gap Single