Brisk DOR08DS Turbo 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 8, resistor, with dual ground electrodes for improved spark and combustion in turbocharged racing engines. Designed for high-performance turbo setups, offering enhanced ignition reliability. Recommended torque: 15-22 ft-lbs. Gap: 0.020-0.035 inches. Sold as each.