Brisk 2MOR10S Silver Racing spark plug for high-performance race car engines. Features a 12mm thread, 26.1mm (1.05in) reach, and 14mm (9/16in) bi-hex with a gasket seat. Heat Range 10, resistor, with a silver center electrode and cut-back ground electrode for superior ignition in turbocharged or high-compression engines. Popular for BMW N54/N55, Mini Cooper S, Mercedes C63 AMG, and Smart ForTwo 1.0L 3-cylinder. Replaces NGK SILZKBR9F8S. Recommended torque: 10-15 ft-lbs. Gap: 0.020-0.025 inches. Sold as each.