Hitachi's environmentally friendly Water Cooled Alternators are engineered to deliver consistent output and meet the long-life demand of today's higher RPM engines. Built with premium diodes, brushes and other components, this Hitachi Alternator meets or exceeds OES specifications. Compared to leading alternatives, Hitachi's Alternators meet the required cut in speed and amperage outputs needed for today's energy intensive vehicles. Housed in a lightweight and durable aluminum shell, all Alternators come with the necessary pulleys for ease of installation. Designed to meet the exact needs of each specific vehicle, Hitachi alternators are the premium choice.