Outfit your semi to be Ready for the Road Ahead with immediate power from a cold engine, with the Delco-Remy 39MT 12V 12-Tooth Starter Motor with OCP. After the turn of a key or press of a button, this replacement starter works alongside the battery to initiate the engine flywheel. Fashioned with reliable components to keep each starter at its best for extensive periods of time. FleetPride is your First Click in Heavy Duty .