2018-19. Torque arm bolt. A threaded rod with a drive head (such as hex, 12 point, torx, etc) on one end used to secure the Engine Support Rod to it's Mounting point. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Engine Torque Strut to it's Mounting point. Engine Mount Bolt.