Product Details: Keeping you Ready for the Road Ahead™, the Delco Remy 22SI™ 12V 150A Hinge Mount Brush Alternator is a strong alternative for medium and heavy duty applications with output up to 150 amps. Avoid the headaches of having to continuously check for signs and symptoms of a bad battery that won't turn or start. This heavy duty alternator stands the test of power being designed to address vehicle applications that require high electrical output. Your truck can maintain lower weight due to its external cooling fan. This means not only enhancing temperature capability, but also your fuel savings. FleetPride is your First Click in Heavy Duty®.