Best Carburetor Power Valves & Gaskets of 2026

Robert Reyes Avatar
Robert Reyes
Last Updated: Jan 10, 2026

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Carburetor power valves and gaskets are essential components of any gasoline engine. The power valve controls the flow of fuel into the engine, while the gasket acts as a seal between the carburetor and the intake manifold. Without these essential parts, the engine would not be able to operate efficiently and may even fail to start. It is important to choose high-quality power valves and gaskets to ensure the longevity and optimal performance of the engine. With the right parts, car enthusiasts and mechanics alike can enjoy a smooth and reliable ride.

At a Glance: Our Top Picks

AED 5065 6.5" Power Valve Cover #TOP 1
AED 5065 6.5" Power Valve
ftb score rating icon 9.9
AED 5045 4.5" Power Valve Cover #TOP 2
AED 5045 4.5" Power Valve
ftb score rating icon 9.8
Holley Power Valve Plug Cover #TOP 3
Holley Power Valve Plug
ftb score rating icon 9.6

Top 10 Carburetor Power Valves & Gaskets

#TOP 1

AED 5065 6.5" Power Valve

AED
5065
1 Count (Pack of 1)
AED 5065 6.5" Power Valve Cover
Advanced Engine Design 5065 6.5' Power Valve, 1 Count (Pack of 1)

The AED 5065 6.5" Power Valve is an auto part that belongs to the category of carburetor power valves and gaskets. It comes in a package with dimensions of 4.0" L X4.0" W X1.0" H and is manufactured in China. The package quantity is one.

What We Like
Durable and reliable auto part
Compact package size for easy storage and transportation
Belongs to a specific category for easy identification and compatibility with other parts
#TOP 2

AED 5045 4.5" Power Valve

AED
5045
1 Count (Pack of 1)
AED 5045 4.5" Power Valve Cover
AED 5045 4.5" Power Valve, 1 Count (Pack of 1)

The AED 5045 Power Valve is a high-quality product made in the USA. It comes with a gasket included, making it easy to install. With this power valve, you can improve the performance of your carburetor and ensure optimal fuel delivery. The gasket provides a secure seal, preventing any leaks or air intake issues. The easy installation process allows you to quickly upgrade your carburetor without any hassle. Plus, with free shipping, you can get this product delivered right to your doorstep. The AED 5045 Power Valve is a reliable and convenient solution for improving the performance of your engine.

What We Like
Made in USA
Easy installation
Improved fuel delivery
#TOP 3

Holley Power Valve Plug

26-36
No Size
Holley Power Valve Plug Cover
Holley Power Valve Plug, Raw

The Holley Power Valve Plug is a high-quality and durable vehicle-specific carburetor part. Made from corrosion-resistant materials, this power valve plug is designed to last long and provide reliable performance. Its easy installation process ensures hassle-free setup for users. With genuine Holley quality parts, you can trust in the durability and functionality of this power valve plug. Whether you are a professional mechanic or a DIY enthusiast, the Holley Power Valve Plug is a convenient and reliable choice for your carburetor needs.

What We Like
Durable and long lasting
Easy installation
Corrosion resistant
#TOP 4

Motorcraft CG765 Carburetor Gasket

CG765
Black
Motorcraft CG765 Carburetor Gasket Cover
Motorcraft CG765 Gasket

The Motorcraft CG765 Gasket is designed to fit various vehicle makes and models, ensuring you can find the right match for your car by checking with the seller. Made in China, this gasket brings you a reliable option for your carburetor needs. Its part number, CG765, helps you easily identify and order the correct piece. The gasket is vehicle-specific, meaning it is crafted to fit precisely, which helps maintain your engine’s performance and prevents leaks. Using the Motorcraft CG765 Gasket ensures that you get a quality, tailored fit for your vehicle’s carburetor system.

What We Like
Wide vehicle compatibility
Reliable vehicle-specific fit
Easy part identification
Carburetor system use
#TOP 5

SeaEagles 125-45 Power Valve for Holley Carburetors

QZ12545
Sliver
1.1 inches
SeaEagles 125-45 Power Valve for Holley Carburetors Cover
SeaEagles Carburetor 4Doos 4.5" Power Valve 125-45 Compatible With Holley 125-45 Power Valve For Carburetors (125-45)

The SeaEagles Power Valve is designed to fit Holley 4150, 4160, M2300, and G59 carburetors, making it a versatile choice for your engine needs. With a 4.5" power valve size, it ensures efficient fuel delivery and improved engine performance. The package includes two power valves and two gaskets, so you have everything needed for a smooth installation. Each valve is tested on real carburetors to guarantee quality and reliability. This product helps you maintain your carburetor’s optimal function, offering convenience and peace of mind with easy compatibility and reliable performance.

What We Like
Wide carburetor compatibility
Includes power valves and gaskets
Tested for quality assurance
Improves engine fuel delivery
#TOP 6

SEAEAGLES 26-36 Power Valve Plug & Gasket

26-36
Sliver
SEAEAGLES 26-36 Power Valve Plug & Gasket Cover
SEAEAGLES 26-36 Power Valve Plug & Gasket Fit for Holley Carburetor Metering Block Power Valve Plug Replacment for Holley 26-36 Power Valve Plug & Gasket

The SEAEAGLES Power Valve Kit is a reliable replacement for your Holley carburetors, specifically the 2300, 4150, 4500, and 4160 models. This kit includes both the Power Valve plug and gasket, ensuring you have everything needed for a complete replacement. Made from high-quality materials, it guarantees durability and consistent performance, so you can trust it to keep your engine running smoothly. Additionally, the installation process is straightforward, allowing you to quickly replace the original components without hassle, saving you time and effort.

What We Like
Genuine replacement parts
Durable materials
Easy to install
Complete kit included
#TOP 7

Holley 125-65 Power Valve

125-65
No Color
No Size
Holley 125-65 Power Valve Cover
Holley 125-65 Single-Stage Power Valve

The Holley Power Valve is designed to improve your carburetor's performance by adjusting fuel delivery based on engine vacuum. It comes with a gasket, which helps ensure a tight seal and prevents leaks, making installation easier and more reliable for you. The valve opens at 6.5 inches of mercury vacuum, allowing your engine to get the right amount of fuel under different driving conditions. This feature helps your engine run smoothly and efficiently, especially during acceleration or load changes. With the Holley Power Valve, you get a simple upgrade that supports better engine response and fuel management.

What We Like
Includes gasket for secure installation
6.5 in. Hg vacuum opening
Improves fuel delivery
Enhances engine performance
#TOP 8

SeaEagles 6.5Hg Power Valve Replacement

QZ125-65
Sliver
SeaEagles 6.5Hg Power Valve Replacement Cover
SeaEagles 2Pieces 6.5Hg Single-Stage Power Valve Repalcement for Holley Carburetor 125-65 6.5' Single-Stage Power Valve Replace Holley # 12-65#5065 Power Valve

The SeaEagles Power Valve Kit is designed to fit Holley 4150 and 4160 carburetors, ensuring compatibility and optimal performance. This replacement kit includes two power valves and four gaskets, providing everything you need for a complete installation. The valves are tested on real carburetors, so you can trust their reliability and efficiency. With this kit, you can enhance your carburetor's functionality, leading to better fuel management and improved engine performance. If you have any questions or need to return or exchange the product, customer support is readily available.

What We Like
Easy installation
Compatible with popular carburetors
Includes gaskets
Tested for reliability
#TOP 9

Motorcraft CG758 Gasket

CG758
Motorcraft CG758 Gasket Cover
Motorcraft - Gasket (P) (CG758)

Motorcraft CG758 Gasket is a high-quality product designed for professionals in the carburetor power valves and gaskets category. It is manufactured by a leading company with a diverse range of award-winning products and equipped with state-of-the-art technology. The product is constantly modernized to meet the demands of the modern user.

What We Like
High-quality and reliable
Designed for professionals
Manufactured by a leading company with a diverse range of award-winning products
#TOP 10

Generic 10.5" Hg Power Valve for Holley Carburetors

Generic
125-1105
Silver
2 inches
Generic 10.5" Hg Power Valve for Holley Carburetors Cover
10.5" Hg Power Valve Single Stage High Flow 4 Door With Gaskets Fits: Holley Carburetor 2300, 4150, 4160 & 4500

The Generic Power Valve Holley is designed to fit various Holley carburetor models, including 2300, 4150, 4160, and 4500. This power valve operates at 10.5 inches of mercury, helping to regulate fuel flow efficiently during engine operation. Its single-stage design allows for smooth and consistent performance, while the high flow capacity ensures your engine gets the fuel it needs under demanding conditions. The four-door configuration provides reliable fuel delivery, and the included gaskets make installation easier and help prevent leaks. This power valve is a practical upgrade for anyone looking to maintain or improve their carburetor's performance.

What We Like
Compatible with multiple Holley models
10.5" Hg vacuum rating
Single-stage high flow design
Includes four-door setup
Comes with installation gaskets
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What does a power valve in a carburetor do?

A power valve in a carburetor enriches the air-fuel mixture when the carburetor goes to wide-open throttle (WOT). It compensates for the drop in intake manifold vacuum at WOT, ensuring the engine receives the right amount of fuel for optimal performance.

2. How do I know what size power valve I have?

To determine the size of a Holley power valve, you can check the stamps on the side or metal reinforcement near the center. The numbers indicate the pressure rating in inches of Mercury (Hg). The range for standard Holley power valves is typically from 2.5 to 10.5 Hg.

3. What are the symptoms of a bad power valve in a carburetor?

A bad power valve in a carburetor can lead to decreased fuel mileage and cause a long crank after a short rest. This is often due to fuel seeping down into the intake manifold, resulting in a flooding situation. If you experience these symptoms, it might indicate a faulty power valve that needs to be replaced.

4. What size power valve should I use?

For power valve size selection, a rule of thumb is to divide your highest part throttle manifold vacuum reading by two and choose the closest size smaller. For example, if you have 8 inches of manifold vacuum, you would use a 3.5 inch Hg power valve.

5. Does a power valve open at idle?

At idle, the power valve can open, but no additional fuel is delivered to the engine because there is no demand from the boosters. To check if a power valve is functioning properly, you can use a suction cup supplied with a vacuum pump to ensure the diaphragm is not damaged.

6. What causes a power valve to fail?

A power valve can fail due to mechanical problems or buildup of unburnt oil, causing it to become stuck open. It is important to identify and address the underlying cause to prevent further issues.

Editor's Notes

During our carburetor power valve & gaskets research, we found 24 carburetor power valve & gaskets products and shortlisted 10 quality products. We collected and analyzed 5,448 customer reviews through our big data system to write the carburetor power valves & gaskets list. We found that most customers choose carburetor power valves & gaskets with an average price of $15.28.

The carburetor power valves & gaskets are available for purchase. We have researched hundreds of brands and picked the top brands of carburetor power valves & gaskets, including AED, Holley, Motorcraft, SeaEagles. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.

Written by
Robert Reyes Avatar

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.