The class-9 warp drive was a type of warp drive with which Intrepid-class starships were equipped, capable of achieving the top sustainable cruise velocity of warp 9.975. (VOY: "Caretaker") The core had a tricyclic input manifold. (VOY: "Relativity") This system was designed to provide a maximum output of four thousand teradynes per second. (VOY: "Drone") It could operate for up to three years before refueling. The reaction chamber was equipped with a compositor, which allowed recrystallization of the vessel's dilithium. (VOY: "Innocence")

The USS Voyager was the first to test such a warp drive in deep space in 2371. (VOY: "Relativity")