Power Master
Power Master 100 Amp 12SI Alternator — Polished GM Original Look
Power Master 100 Amp 12SI Alternator — Polished GM Original Look
Power Master 100 Amp 12SI Alternator — Polished GM Original Look
Power Master 100 Amp 12SI Alternator — Polished GM Original Look
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Power Master 100 Amp 12SI Alternator — Polished GM Original LookPower Master 100 Amp 12SI Alternator — Polished GM Original LookPower Master 100 Amp 12SI Alternator — Polished GM Original LookPower Master 100 Amp 12SI Alternator — Polished GM Original Look
Power Master

Power Master 100 Amp 12SI Alternator — Polished GM Original Look

SKU: BCTD_27294

About Power Master Power Master engineers high-quality automotive parts and ...Read more

Price:
$181.99
1810 ENTRIES10X
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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

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About Power Master

Power Master engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Power Master lineup with fast shipping and expert fitment support — order with confidence.

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High-Output Charging with Classic Style

Upgrade your vehicle's electrical system without sacrificing that period-correct aesthetic. The Power Master 100 Amp 12SI Alternator combines modern high-output performance with the classic GM original look. Whether you are running aftermarket cooling fans, high-end audio, or electronic fuel injection, this 100-amp unit provides the steady voltage required to keep your electrical system stable and reliable.

Product Highlights

  • High Output: 100 amps to support modern electrical demands.
  • Classic Design: 12SI housing maintains the original GM appearance.
  • Polished Finish: High-shine aluminum case for a show-ready engine bay.
  • Flexible Wiring: Compatible with both 1-wire and 3-wire configurations.
  • Easy Fitment: Standard straight mount with single V-belt pulley.

This alternator is the perfect solution for classic car owners who want to modernize their charging system while maintaining a clean, factory-style appearance. The polished aluminum case resists corrosion and looks great under the hood. For high-quality charging system upgrades and reliable automotive electrical parts, trust the experts at GGCRACING.

About Power Master

Power Master engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Power Master lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

High-Output Charging with Classic Style

Upgrade your vehicle's electrical system without sacrificing that period-correct aesthetic. The Power Master 100 Amp 12SI Alternator combines modern high-output performance with the classic GM original look. Whether you are running aftermarket cooling fans, high-end audio, or electronic fuel injection, this 100-amp unit provides the steady voltage required to keep your electrical system stable and reliable.

Product Highlights

  • High Output: 100 amps to support modern electrical demands.
  • Classic Design: 12SI housing maintains the original GM appearance.
  • Polished Finish: High-shine aluminum case for a show-ready engine bay.
  • Flexible Wiring: Compatible with both 1-wire and 3-wire configurations.
  • Easy Fitment: Standard straight mount with single V-belt pulley.

This alternator is the perfect solution for classic car owners who want to modernize their charging system while maintaining a clean, factory-style appearance. The polished aluminum case resists corrosion and looks great under the hood. For high-quality charging system upgrades and reliable automotive electrical parts, trust the experts at GGCRACING.

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