Product Summary

One Wire Alternator, 140 amp Alternator Amperage

  • It is a 12V alternator with a negative ground
  • This alternator has a stock looking GM 10SI case
  • Comes with a V groove pulley and has an internal regulator
  • It puts out 140 amps of current and is a simple 1 wire hookup
  • Features a low idle cut-in internal regulator and provides plenty of charging at low RPMs
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Key Specs

MFG. Part #7127K
One Wire AlternatorYes
Alternator Amperage140 amp
Alternator FinishNatural
Pulley StyleV-belt
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Need To Know

Quick and Easy Returns

Return Policy

Tuff Stuff 7127K Details

All Tuff Stuff alternators are hand built in Cleveland, Ohio and are tested to meet or exceed OEM specifications. All Tuff Stuff alternators are made from 100% new components and carry a one year limited warranty.

Tuff Stuff has alternator applications for virtually all muscle cars, hot rods, customs and light trucks in just about every finish imaginable. Many enthusiasts prefer our clean, simple 1-wire alternator option which features a low idle cut-in internal regulator and provides plenty of charging at low RPMs. Available in chrome plated, polished aluminum, powder coated and plain as cast finishes. All alternators are for 12 volt, negative ground systems, except where noted.

  • Alternator
  • 140 AMP
  • OEM Or 1 Wire
  • V Groove Pulley
  • Internal Regulator
  • As Cast

Charts

Diagram (PDF)

Tuff Stuff 7127K Specifications

KEY SPECS
MFG. Part #7127K
BrandTuff Stuff
One Wire AlternatorYes
Alternator Amperage140 amp
Alternator FinishNatural
Pulley StyleV-belt
Belt TypeV-Belt
GENERAL
Alternator Case StyleGM 10SI/10DN/12SI
Voltage Required12-Volt
RegulatorInternal
Regulator StyleInternal
Regulator IncludedYes
Alternator Pulley IncludedYes
Alternator Pulley Grooves1 V-groove
Alternator Brackets IncludedNo
ColorNatural
Sold in QuantityEach
NotesWith 12si style smooth rear housing. V-belt pulley accommodates 3/8 in. wide belts.
GTIN Code698252015639
Belt IncludedNo

Ratings & Reviews

5

8 Reviews

Overall Assessment

Customers have expressed satisfaction with our product, an alternator, highlighting its exceptional quality and reliable performance. Many share positive experiences, praising it for fitting well in their cars, particularly a C3 vette, and offering an upgrade from 63amps to 140amps. The alternator's painless installation process due to its one-wire hook up earns praise and the robust, durable finish further enhances its appeal. The fact that it is American-made is positively noted. The superior power at a great value differentiates our product from competitors. Overall, customers trust our product and recommend it for enhancing their charging systems.

5

8 reviews

5

8

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Good fast service

5.0

4 years ago

William DeBerry

Duncan ok

Verified

Great doing business whit them

Would Recommend

So far so good got it quick and it fit

5.0

4 years ago

Bill

Orlando Fl.

Verified

Time will tell

Would Recommend

This alternator works great

5.0

4 years ago

Duke

Pasadena Md

Verified

Been working flawlessly for several months on my C3 vette

Would Recommend

Yes.

5.0

5 years ago

Warren

Shafer, MN

Verified

I now trust my charging system

Would Recommend

Awesome upgrade from 63amps to 140 amps

5.0

6 years ago

Brad

Okv

Verified

Tuff Stuff got my business because they're an American company and their stuff is top quality.

Would Recommend

Great just what I needed

5.0

6 years ago

Dewayne Polk

Florence ms

Verified

Needed more amps it works great

Great Alternator, Great Value

5.0

7 years ago

Don

Baltimore, MD

Verified

I spoke with Tuff Stuff tech support prior to purchasing. They were extremely helpful in matching my application. Installation was easy and the unit works very well. Great finish and unit looks durable. A bargain to get 140 amp output at this price. And it's AMERICAN MADE!

Would Recommend

Bolted on as a perfect replacement.

5.0

8 years ago

Norb

WI

Verified

One wire hook up made it easy,and cleaned up the engine bay.

Would Recommend

Showing 8 of 8 reviews

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