The Delco Remy 39MT™ 12V 12-Tooth Starter Motor ensures you are Ready for the Road Ahead™, with 30% increased crank speed compared to the competition, providing your truck with the engine power it requires. These new, heavy duty starters come fitted with Over Crank Protection (OCP). OCP monitors the internal temperature, preventing thermal electric damage to the starter by preventing over cranking. This heavy duty starter also features an Integral Magnetic Switch (IMS). IMS reduces voltage drop and ensures the solenoid receives the maximum available voltage in any starting condition. FleetPride is your First Click in Heavy Duty®.