Power Master 150 Amp 12SI Alternator 1-Wire — Fits GM V-Belt Systems

SKU: BCTD_47293
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GM 12SI 150 Amp 1-Wire AlternatorSimplify your wiring and boost ...Read More

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

GM 12SI 150 Amp 1-Wire Alternator

Simplify your wiring and boost your electrical output with the Power Master 12SI 150 Amp Alternator. Featuring a classic GM original look, this 1-wire unit is the perfect upgrade for classic cars, street rods, and custom builds using traditional V-belt pulley systems. It provides modern charging power while maintaining the vintage aesthetic of your engine bay.

Key Features and Benefits

  • Output: 150 Amps for modern electrical requirements
  • Wiring: Simple 1-wire hookup for easy installation
  • Pulley: Single V-belt pulley included
  • Case: Natural aluminum 12SI style
  • Mounting: Straight mount for GM applications

The 1-wire design eliminates the need for complex external regulators or extra wiring harnesses, making it an ideal choice for engine swaps and restoration projects. Despite its classic appearance, this alternator is packed with modern internal components that provide high amperage at lower RPMs, ensuring your battery stays charged even at idle. The durable aluminum case is built to last, providing excellent heat dissipation and a clean, professional look. Whether you are restoring a classic Chevy or building a custom hot rod, this alternator delivers the performance and simplicity you need. Find all your essential electrical components at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

GM 12SI 150 Amp 1-Wire Alternator

Simplify your wiring and boost your electrical output with the Power Master 12SI 150 Amp Alternator. Featuring a classic GM original look, this 1-wire unit is the perfect upgrade for classic cars, street rods, and custom builds using traditional V-belt pulley systems. It provides modern charging power while maintaining the vintage aesthetic of your engine bay.

Key Features and Benefits

  • Output: 150 Amps for modern electrical requirements
  • Wiring: Simple 1-wire hookup for easy installation
  • Pulley: Single V-belt pulley included
  • Case: Natural aluminum 12SI style
  • Mounting: Straight mount for GM applications

The 1-wire design eliminates the need for complex external regulators or extra wiring harnesses, making it an ideal choice for engine swaps and restoration projects. Despite its classic appearance, this alternator is packed with modern internal components that provide high amperage at lower RPMs, ensuring your battery stays charged even at idle. The durable aluminum case is built to last, providing excellent heat dissipation and a clean, professional look. Whether you are restoring a classic Chevy or building a custom hot rod, this alternator delivers the performance and simplicity you need. Find all your essential electrical components at GGCRACING.

Product Details

Product Description

GM 12SI 150 Amp 1-Wire Alternator

Simplify your wiring and boost your electrical output with the Power Master 12SI 150 Amp Alternator. Featuring a classic GM original look, this 1-wire unit is the perfect upgrade for classic cars, street rods, and custom builds using traditional V-belt pulley systems. It provides modern charging power while maintaining the vintage aesthetic of your engine bay.

Key Features and Benefits

  • Output: 150 Amps for modern electrical requirements
  • Wiring: Simple 1-wire hookup for easy installation
  • Pulley: Single V-belt pulley included
  • Case: Natural aluminum 12SI style
  • Mounting: Straight mount for GM applications

The 1-wire design eliminates the need for complex external regulators or extra wiring harnesses, making it an ideal choice for engine swaps and restoration projects. Despite its classic appearance, this alternator is packed with modern internal components that provide high amperage at lower RPMs, ensuring your battery stays charged even at idle. The durable aluminum case is built to last, providing excellent heat dissipation and a clean, professional look. Whether you are restoring a classic Chevy or building a custom hot rod, this alternator delivers the performance and simplicity you need. Find all your essential electrical components at GGCRACING.

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