Powermaster 57294 GM 12SI High Output 150 Amp Alternator Black

The Powermaster 57294 is a high-performance GM 12SI-style alternator engineered to deliver reliable power for street rods, muscle cars, trucks, and vehicles with high electrical demands. This alternator features a robust 150-amp maximum output with 90 amps at idle and 125 amps at cruising speed, making it ideal for vehicles equipped with electric cooling fans, fuel pumps, upgraded audio systems, and other power-hungry accessories.

Key Features:

• GM 12SI case style with OE-look black powder-coated finish
• 150 amp output (90 amps at idle, 125 amps at cruise)
• Internally regulated for simplified installation
• Versatile 1-wire or 3-wire operation capability
• Single-groove V-belt pulley included
• Integrated fan baffle for improved cooling
• Straight mount design with 6.61-inch bolt spacing
• 12-volt system compatible

This alternator fits most GM vehicles from 1965-1985 with straight mount configuration, including Chevrolet, GMC, Buick, Oldsmobile, and Pontiac applications. The durable powder-coated black finish provides excellent corrosion resistance while maintaining a clean, professional appearance under the hood. The smooth die-cast housing features Powermaster's signature teardrop design with special cooling vents and gold battery post for enhanced performance and aesthetics.