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Vehicle Info NeededCS121 3-Hole Mount 5.31" Alternator 100 Amp
Ships on 09/10/2026
Lowest Price Guarantee- CS121 3-Hole Mount 5.31" Alternator
- 100 Amp
- With 1-Wire Voltage Regulator
- 6-Groove Pulley
- Chrome
- True One Wire Hookup w/Set Voltage Of 14.6
- High Output To Weight Ratio
- Excellent Idle Output
- Gold Battery Post
- Proof Of Performance TagsNote: No Charge Wire Included.
GM has offered several series of alternators over the years, each time taking a step up in performance. The great thing about these alternators and aftermarket brackets is that for the most part they are interchangeable. Starting with the externally regulated 10dn alternator of the 1960s and moving all the way to the CS130D alternator of late, aftermarket brackets with rod end tensioners will interchange. The 2" mounting foot width is common to all of them and the 6.61" bolt spacing is common (except the CS130D has 7.24" bolt spacing, which many brackets accommodate). Charge Wire Not Included. Made in the U.S.A.
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Features:
- Smallest GM-Style 100 Amp Alternator
- True one-wire hookup with set voltage of 14.6
- High output to weight ratio; excellent idle output
- Proof-of-Performance Tag
- Gold Battery Post 75A Specifications
- 60A @ 2,400 RPM @ 7.2 VDC @ 77F
- Operating Range: -40C to 150C
- Maximum RPM: 18,000
100A Specifications - 60A @ 2,400 RPM @ 13.2 VDC @ 77F
- Operating Range: -40C to 150C
- Maximum RPM: 18,000 Note: XS Volt is a powerful internal regulating system. These one-wire alternators offer the highest stability available for modern electrical systems.
- Digital Control: Response time in milliseconds, compared to seconds for analog regulators
- Powerful, Reliable Internals: Short circuit protection and loss of ground protection in a sealed, vibration-resistant housing
- One-Wire Operation: Easy to connect, turns on and off with the engine
The XS Volt gives a great deal of control and provides many benefits even without adjustment. With its digital regulator, lightning quick response time, and the stability a digital system provides, electronic components function better.
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