The Powermaster 8578011-1 HPR Small Frame Alternator is a high-output hairpin replacement unit delivering 180 amps at full output and over 145 amps at idle — significantly outperforming stock GM alternators in the same mounting footprint. Designed as a direct bolt-in replacement for GM 10DN, 10SI, 12SI, and CS130 style alternator applications, this unit features a 6.14 in. straight mount configuration and a V-belt pulley. The simple 1-wire hookup requires only the output cable connection, eliminating factory regulator wiring. Internal efficient components produce more output while consuming less engine power, making this an ideal upgrade for street rods, muscle cars, and performance vehicles running high electrical loads.

Powermaster 8578011-1 HPR Small Frame Alternator Features:

• Direct Replacement for GM 10DN, 10SI, 12SI, and CS130 Style Alternator Applications
• 180 Amp Advertised Output; 145+ Amps at Idle; 12 Volt
• 6.14 in. Straight Mount Configuration; V-Belt Pulley Included
• 1-Wire Connection Requires Only Output Cable; Internal Voltage Regulator; Clockwise Rotation
• Efficient Internal Components Produce More Output While Consuming Less Engine Power
• Black Powdercoated Finish
• Sold Individually