Best Performance Alternator Pulleys of 2025
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Performance alternator pulleys are designed to increase the efficiency of the alternator in a vehicle. These pulleys are made from high-quality materials and are designed to reduce the weight of the alternator, which in turn reduces the rotational mass. This reduction in mass allows the alternator to spin more freely, which leads to an increase in power output. Performance alternator pulleys are available in a variety of sizes and designs to fit a wide range of vehicles. They are an affordable and effective way to improve the performance of a vehicle's electrical system.
At a Glance: Our Top Picks
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9.5
Top 9 Performance Alternator Pulleys
March Performance 137 Performance Series Alternator Pulley
This car alternator pulley features a 2 11/16" diameter one-groove pulley with cover, reducing accessory drag for more horsepower. Made from 6061-T6 billet aluminum for extra strength and wear, it eliminates belt throwing. Made in the U.S.A.
Mr. Gasket Chrome Plated Alternator Pulley Kit
This car alternator pulley kit by Mr. Gasket is constructed from high-quality material and corrosion-resistant. It is designed to aid in the smooth functioning of the alternator and offers long-lasting durability. With its hassle-free installation, you can easily set it up without any difficulty.
Racing Power Company Satin Alternator Pulley
This Racing Power Company Satin Single Groove Alternator Pulley is designed for Small Block Chevy. The package dimensions are 8.75 inches in length x 6 inches in width x 2.25 inches in height. The item package weighs 0.59 pounds. It is made in Taiwan, Province of China.
Mr. Gasket 6809 Alternator Pulley Kit
The Mr. Gasket Pulley Kit is a high-quality car alternator pulley kit designed to aid in the smooth functioning of the alternator. Constructed from high-quality material, it offers long-lasting durability and is corrosion-resistant. The kit facilitates hassle-free installation, making it convenient for users. With this kit, you can rest assured that your alternator will function optimally, ensuring that your car runs smoothly. Its durable construction also means that it will last for a long time, saving you money in the long run. Additionally, its corrosion-resistant properties ensure that it remains in good condition even in harsh weather conditions. Overall, the Mr. Gasket Pulley Kit is a reliable and convenient option for anyone in need of a car alternator pulley kit.
Car Alternator Pulley: PULLEY, ALT, GM/FORD
This car alternator pulley is designed to reduce alternator speed for high engine RPM applications, helping to reduce alternator bearing loads. Made from high-grade, lightweight aluminum, its deep groove helps retain V-belts at high RPM. The pulley uses 36° x 17/32" V-belts.
Racing Power Company Alternator Fan Pulley
This polished aluminum alternator fan pulley by Racing Power Company comes in a package with dimensions of 8.75 x 0.75 x 7.75 inches and weighs 0.35 pounds. It is made in Taiwan, Province Of China and has a part number of R8867. This product falls under the category of car alternator pulleys.
Racing Power R9446 Alternator Pulley and Fan
This product is an auto part, specifically a car alternator pulley made in Taiwan. It has a package weight of 0.453 kg and package dimensions of 29.845 cm (H) x 1.905 cm (L) x 22.225 cm (W).
Moroso Alternator Pulley
The Moroso Alternator Pulley is made in the USA and has a package dimension of 1.7 cms L x 16.8 cms W x 24.2 cms H, with a weight of 0.321 kilograms. It is designed to fit specific vehicles and falls under the Car Alternator Pulleys category.
Precision Aluminum Pulley for Car Alternators
This precision aluminum pulley is made from high-grade lightweight castings and has extra-deep belt grooves to provide added belt retention during rapid changes in engine RPM. The small pulley diameter slows fan, water pump, and alternator speed to reduce horsepower-robbing drag, and high RPM water pump operation is improved, reducing impeller speed below the cavitation threshold. This pulley uses a 36° x 17/32" wide belt, and is perfect for car alternators.
Frequently Asked Questions (FAQs)
1. Does alternator pulley size matter?
Using a smaller pulley will speed the rotor up, and the alternator will produce more power. This won't effect the ECM or anything else in the vehicle, since top voltage will still be regulated.
2. Are all alternator pulleys the same?
Pulleys must match the appropriate alternator as shown on the list of available pulleys. Alternator shaft sizes are not all identical so a pulley from one alternator may not be interchangeable with a pulley from another. These pulleys are also available separately for purchase , typically the cost is $60-100.
3. What is the pulley ratio in an alternator?
To calculate the actual alternator RPM, determine the ratio between the two pulley diameters. Generally, the alternator should be 1:1 with the motor for circle track racing. For drag racing, the alternator should be overdriven by a ratio of 1.75:1 or more. This will allow charging on the return slip and in staging.
4. Can you change pulleys on an alternator?
In many cases it is possible to remove and install the overrunning alternator pulley while the alternator is still on the engine. The plastic protective cap cannot be re-used after it has been removed from the pulley. A replacement cap is supplied with the new part.
During our performance alternator pulley research, we found 9 performance alternator pulley products and shortlisted 9 quality products. We collected and analyzed 2,251 customer reviews through our big data system to write the performance alternator pulleys list. We found that most customers choose performance alternator pulleys with an average price of $42.74.
The performance alternator pulleys are available for purchase. We have researched hundreds of brands and picked the top brands of performance alternator pulleys, including MARCH, Mr. Gasket, Racing Power, Moroso. The seller of top 1 product has received honest feedback from 386 consumers with an average rating of 4.7.
Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.