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Powermaster 37294 140 Amp Chrome 12SI Alternator 1-Wire

(Jeep Wrangler 1987-90, Cherokee 1984-91, CJ7 1976-86, CJ5 1975-83, Comanche 1986, Grand Wagoneer 1984-91, J10 1975-88, Wagoneer 1984-86 + 133 more models)

Manufacturer

Picture for manufacturer Powermaster

Part Number

37294
7 reviews
Sale Price

$239.88

In Stock (10+)

delivery box

Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Powermaster 37294 is a high-output 140-amp alternator featuring classic GM 12SI design with modern performance upgrades. This chrome-finished alternator delivers reliable charging power for street rods, muscle cars, and custom builds requiring additional electrical capacity while maintaining an OE appearance.

Key Features:

  • 140-amp output for high-demand electrical systems
  • One-wire design simplifies installation - no external regulator required
  • Premium chrome finish for show-quality appearance
  • Baffled internal fan improves cooling efficiency
  • Includes cone-style spacer and single-groove V-belt pulley
  • Direct replacement for GM 12SI case style alternators
  • Ideal for vehicles with aftermarket accessories, stereo systems, and lighting upgrades

This alternator combines the proven reliability of the GM 12SI platform with upgraded internal components to deliver consistent high-amperage output. The chrome finish is polished to a mirror shine, making it perfect for engine bays where appearance matters. The one-wire configuration eliminates the need for an external voltage regulator and simplifies wiring, requiring only a single connection to the battery positive terminal.

Products specifications

Fits

Jeep Wrangler 1987-90, Cherokee 1984-91, CJ7 1976-86, CJ5 1975-83, Comanche 1986, Grand Wagoneer 1984-91, J10 1975-88, Wagoneer 1984-86, J20 1976, 1978-88, CJ6 1975; Cadillac DeVille 1963-79, Eldorado 1963-79, Seville 1976-79 + 128 more models

Advertised Amperage Output

140 amps

Alternator Brackets Included

No

Alternator Case Style

GM 10si

Alternator Finish

Chrome plated

Belt Included

No

One-Wire Capable

Yes

Pulley Style

V-belt

Quantity

Sold individually.

Regulator Included

Yes

Regulator Style

Internal

Voltage Compatibility

12

Very very good, even great! Best prices on the web and fastes service. Will continue to purchase all my automotive needs from here!

I sent my order for some comp cams lifters on Monday 1-16-2012 at around 8:30 and the Item was still shipped on the next day Tuesday. This was awesome. I received my product on 1-19-2012. They have had the fastest turn around time that I have ever delt with. I would highly recommend them for your auto parts needs. They also had the cheapest price I could fine, including the shipping fee.<br>I like the fact that they sent me an e-mail that my item had shipped and gave the shipping number for tracking.

great service. Been looking for this trounce product for over a year. best hand cleaner i have ever used. makes the orange stuf seem like using just water.

Fine

Quick shipping, nice easy to use web site, and the lowest price with shipping around.. will use again..

Good site easy to search for and find parts. The lowest prices on almost every part I have been able to find for my truck.

I am impressed with they mail order service. Recommended.

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