Product Details: The Delco Remy 39MT™ 12V 12-Tooth Starter Motor ensures you are Ready for the Road Ahead™, with its lightweight and compact capacity, making replacement installation a breeze. The 39MT™ series starters boasts an increased 30% crank speed than the competition. Gain the power your truck needs to reduce downtime. Featuring an Integral Magnetic Switch (IMS), voltage drop is reduced and the solenoid consistently receives the maximum available voltage in any starting condition. The noseless sealed configuration in this heavy duty starter minimizes debris accumulation and contamination. This 39MT™ starter motor is ideal for heavy duty trucks. FleetPride is your First Click in Heavy Duty®.