When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Inside mounting ear-to-ear measures a total of 7\", Overall length is 10-5/8\" and the case O.D. is 5\", Specifically designed for the 1955-1964 GM vehicles, The pulley is designed to work with a 3/8\" wide belt, Puts out 65 amp at idle, 75 amp when cruising, 90 amp at the top end Powermaster 82051 PowerGEN 1955-64 GM Alternator, 12-Volt, Plain Sku # 91067170-PLN Mfr. Part # 82051 Condition New Brand Powermaster Sold Each Details
These Powermaster Powergens allow you to keep the authentic looks of a generator with the efficiency of an alternator. They put out 90 amps maximum with 65 amps at idle and 75 amps at cruise and are a simple one wire design.
- 65 amp idle, 75 amp cruise, 90 amp top end
- Pulley works with 3/8\" wide belt
- Inside mounting ear-to-ear is 7\"
- Overall length is 10-5/8\"
- O.D. of case is 5\"
Fits 1955-1964 GM models (except with generator mounted power steering pump). Choose plain or polished.
Specs One Wire Alternator Yes Alternator Case Style Generator Alternator Amperage 90 amp Voltage Required 12-Volt Regulator Internal Regulator Style Internal Alternator Finish Natural Regulator Included Yes Alternator Material Aluminum Alternator Pulley Included Yes Pulley Diameter 2.08" Belt Width 0.375" Alternator Brackets Included No Inside Diameter 1.2" Outside Diameter 5" Color Black Sold in Quantity Each MFG. Part # 82051 Notes Made in the USA GTIN Code 692209011576 Belt Included No Pulley Style V-belt Coating Type Powdercoated Belt Type V-Belt Reviews Yes Rated by Paul on July 21, 2026
Summary: Replaced 30 amp generator
Yes, I recommend this product.
I would buy this again Rated by Quico on August 27, 2024
Summary: It was easy to install, but you will need a spacer to bolt on to bracket.
Yes, I recommend this product.
I like this product! Rated by Bob on January 29, 2023
Summary: Put this on my 1949 Chevy, with a 1960 235 cu.in. 6cyl 12 volt. Works great!
Yes, I recommend this product.
Great Product and Service Rated by 1951 Chevy COE on May 03, 2021
Summary: I dropped this into my 1951 2-ton Chevy cab over. I had to use the old generator's pulley assembly, and that worked out fine. What a great product.
Yes, I recommend this product.
it fits and looks great Rated by johnny rotten on December 24, 2019
Summary: works very well and fits the look of the model a
Yes, I recommend this product.
Related Items / Suggested Parts Powermaster 282051 PowerGEN 1955-64 GM Alternator, 12-Volt, Polished Powermaster PowerGEN 1955-64 GM 1-Wire Alternators, 12-Volt Tuff Stuff 754636 36 Inch 8 Gauge Charge Wire With Boot 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 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 74 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.
