Product Details: The Delco Remy 39MT™ 12V 11-Tooth Starter Motor ensures you are Ready for the Road Ahead™, with its lightweight and compact design. This not only makes it easy for installation, but is also ideal for heavy duty trucks. The sealed noiseless sealed configuration in this heavy duty starter minimizes accumulation and contamination from debris. The 39MT™ series of starters have an increased 30% crank speed than the competition. In addition, the Integral Magnetic Switch (IMS) feature reduces voltage drop and ensures the solenoid receives the maximum available voltage in any starting condition your heavy duty truck may encounter. FleetPride is your First Click in Heavy Duty®.