Product Details: The Delco Remy 39MT™ 12V 11-Tooth Starter Motor ensures you are Ready for the Road Ahead™, with its 30% increased crank speed over the competition. With the 39MT™ lightweight design, this starter replacement is easy to install, making it ideal for heavy duty trucks. These new, heavy duty models come fitted with Over Crank Protection (OCP). OCP monitors the internal temperature, preventing thermal damage to the starter by preventing over cranking. Gain a much smoother start with these starters which also features an Integral Magnetic Switch (IMS). IMS reduces voltage drop and ensures the solenoid receives the maximum available voltage in any starting condition. <br/> <br/>FleetPride is your First Click in Heavy Duty®.