Alternator Serpentine GM 150amp 1-Wire Black

The Holley Alternator Serpentine GM 150amp 1-Wire Black is a high-output charging system designed for GM LS-series engine swaps and performance builds. With a 150-amp output capacity and 1-wire configuration, this alternator delivers the electrical power needed for modern fuel injection systems, ignition components, and auxiliary equipment in street rods, restorations, and track vehicles. The 6-rib serpentine pulley integrates seamlessly with standard LS accessory drive layouts, while the black anodized aluminum case provides corrosion resistance and a finished appearance under the hood.

At 150 amps, this alternator supplies sufficient charging capacity for fuel-injected LS engines running electronic fuel management, ignition systems, and modern aftermarket components without voltage sag under load. The 1-wire design simplifies installation by eliminating the need for external voltage regulators and factory-style multi-wire harnesses—a significant advantage in custom engine compartments where space is limited or wiring complexity needs to be minimized. The serpentine pulley configuration matches the standard LS accessory drive, ensuring proper belt tension and pulley alignment without adapter modifications. Aluminum construction keeps weight minimal while maintaining thermal dissipation during sustained charging cycles.

This alternator is purpose-built for builders integrating LS engines into non-original platforms—hot rods, muscle car restorations, custom trucks, and race applications where OEM charging systems are incompatible. The 150-amp output addresses the electrical demands of fuel injection, electronic ignition, and auxiliary systems without requiring dual alternators in most street-driven installations. The 1-wire configuration appeals to builders seeking straightforward electrical layouts and reduced installation time, particularly in tight engine bays where traditional harness routing is impractical.