The M4.5-StarDrive maneuvering engine was a type of capital ship sublight drive built by the Mon Calamari. Six of these were used aboard the Home One-type and Liberty-type variants of the MC80 Star Cruiser, in conjunction with four M8.0-StarDrive main engines.
While the combination of four main and six small engines matches the thruster arrangement of the Home One, it does not directly match that of Liberty, which has nine exhaust nozzles of varying sizes.