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
Tuff Stuff 7127K 1 Wire Alternator, 140 AMP, V Groove Pulley Tuff Stuff
Tuff Stuff 7127K 1 Wire Alternator, 140 AMP, V Groove Pulley
Sku # 91033008
Mfr. Part # 7127K
Condition
New
Brand
Tuff Stuff
Sold
Each
Details
Info

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

(PDF)

Specs
Sold in Quantity
Each
Belt Type
V-Belt
Color
Natural
One Wire Alternator
Yes
MFG. Part #
7127K
Regulator Included
Yes
Alternator Pulley Included
Yes
Voltage Required
12-Volt
Alternator Amperage
140 amp
Alternator Finish
Natural
Pulley Style
V-belt
Alternator Brackets Included
No
Belt Included
No
Regulator Style
Internal
GTIN Code
698252015639
Alternator Case Style
GM 10SI/10DN/12SI
Notes
With 12si style smooth rear housing. V-belt pulley accommodates 3/8 in. wide belts.
Reviews

Good fast service

Rated
Product Rating
by William DeBerry on October 14, 2021

Summary: Great doing business whit them

Yes, I recommend this product.

So far so good got it quick and it fit

Rated
Product Rating
by Bill on August 18, 2021

Summary: Time will tell

Yes, I recommend this product.

This alternator works great

Rated
Product Rating
by Duke on July 17, 2021

Summary: Been working flawlessly for several months on my C3 vette

Yes, I recommend this product.

Yes.

Rated
Product Rating
by Warren on August 04, 2020

Summary: I now trust my charging system

Yes, I recommend this product.

Awesome upgrade from 63amps to 140 amps

Rated
Product Rating
by Brad on November 04, 2019

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

Yes, I recommend this product.

Tech Support
We're here to help before and after your purchase. If you have a question or need assistance with one of our products, please contact us through eBay Messaging and a knowledgeable Speedway Motors team member will be happy to help.
About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 72 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.