Brisk DOR17YTE-1 Super Yttrium Racing spark plug for race car engines. Features a 14mm thread, 19mm (3/4in) reach, and 16mm (5/8in) hex with a gasket seat. Heat Range 17, resistor, with triple ground yttrium electrodes for enhanced spark and combustion efficiency. Ideal for high-performance racing engines, offering improved ignition and durability. Recommended torque: 15-22 ft-lbs. Gap: 0.020-0.035 inches. Sold as each.