High Output Performance – Produces up to 90 amps maximum output with 68 amps at turn-on around 1600 RPM, ideal for race and street applications, One Wire Simplicity – One-wire capable design with internal regulator allows for clean, straightforward installation, Compact Mini Design – Lightweight, space-saving alternator fits easily in tight engine compartments without sacrificing output, GM Denso Style Fitment – Features 6.15″ mount center-to-center spacing with included V-belt pulley for versatile applications, Complete Ready-to-Run Unit – Includes internal regulator and pulley, delivering reliable 12-volt charging in a durable all-black finish
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GM Denso Style 1-Wire Mini Race All Black Alternator, 90 Amp
Sku # 2891004-BLK
Mfr. Part # 2891004-BLK
Details
Speedway Motors mini alternators are a great addition to your engine, whether it’s for the great look or the reliable high-amperage output. This alternator produces max 90 amps at max rpm (68 amps at turn on 1600 RPM), which will generally meet the demand of a hot rod or race application. Its compact and lightweight design allows for installation in the tightest spaces.
Specifications:
- Alternator Style: Nippondenso
- 6.15″ mount center to center
- Maximum Amperage Output: 90 Amps (68 amps @ turn on 1600 RPM)
- Voltage Compatibility: 12 Volts
- One-Wire Capable: Yes
- Regulator Style: Internal
- Regulator Included: Yes
- Pulley Included: Yes
- Pulley Style: V-belt
- Finish: Choose Satin or Black
Specs
Alternator Case Style
Nippondenso
Alternator Amperage
90 amp
Alternator Finish
Powder Coated
Notes
PULLEY NUT THREADS M14-1.5
Reviews
Perfect to replace Hitachi external regulator on Courier
Rated
by Greg on June 02, 2026
Summary: Perfect size to convert to a one wire alternator on a 1973 Ford Courier
Yes, I recommend this product.
I would buy it again
Rated
by Dragster on April 30, 2026
Summary: Dragracing
Yes, I recommend this product.
just what I needed.
Rated
by jfb05177 on January 04, 2026
Summary: thanks for the assistance in placing order. arrived when promised. installed and working
Yes, I recommend this product.
I recommend this to any hot rod builder
Rated
by 34 Plymouth on November 13, 2025
Summary: Put this on my 34 Plymouth hot rod it works great easy to install
Yes, I recommend this product.
I would buy again
Rated
by Dirtfun3 on May 06, 2025
Summary: Install was easy
Yes, I recommend this product.
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GM Denso Style 1-Wire Mini Race Alternator Kit, 90A, Low Mount
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 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.