Brisk ER14YS Silver Racing spark plug for race car engines. Features a 14mm thread, 26.5mm (1.04in) reach, and 16mm (5/8in) hex with a gasket seat. Heat Range 14, resistor, with a silver center electrode for excellent heat dissipation and ignition in high-performance racing engines. Ideal for turbo or nitrous setups. Recommended torque: 15-22 ft-lbs. Gap: 0.020-0.035 inches. Sold as each.