Product Details: The Delco Remy 28SI™ 12V 200A Long Hinge Mount Brush Alternator ensures you are Ready for the Road Ahead™, with its design to address vehicle applications that require high electrical output, while maintaining lower weight, enhancing temperature capability, and increasing fuel savings. This heavy duty alternator raises the bar by producing 200 amps at road speed and 140 amps at idle. Built with a dual internal fan, the 28SI™ brush style alternator provides maximum cooling compared to conventional single external fan designs. Equipped with Remote Sense technology, this heavy duty alternator also uses a second wire that interprets actual voltage from the battery and increases voltage output to ensure a constant 14 volts at the battery. Thus, your battery is brought to a fully charged state in half the time with the power you need when you need it for your truck. FleetPride is your First Click in Heavy Duty®.