Update your semi with rapid power from a cold engine, with the Delco-Remy 39MT 12V 11-Tooth Starter Motor with OCP that ensures you're Ready for the Road Ahead™. This replacement starter pairs with the battery to engage the engine flywheel after the turn of a key or press of a button. Engineered with reliable components to keep each starter at its best for extended periods of time. FleetPride is your First Click in Heavy Duty®.