EDELBROCK Holley Demon Fuel Vacuum Secondary Diaphragm 085347124046 Holley/demon/quick

( Brand: Edelbrock ), ( Type: Carburetor Secondary Throttle Diaphragm ), ( Country/region Of Manufacture: United States ), ( Item Length: 5.000 ), ( UPC: 085347124046 ), ( Manufacturer Part Number: 12404 )

Review EDELBROCK Holley/demon/quick Fuel Vacuum Secondary Diaphragm

The Edelbrock 12404 vacuum secondary diaphragm is a crucial component in the carburetor setup of various hot rods and performance engines. This diaphragm is specifically designed to work with Holley, Demon, and Quick Fuel carburetors that utilize vacuum secondary systems.

The vacuum secondary system in these carburetors relies on the intake vacuum to help control the fuel mixture, ensuring optimal engine performance under various conditions. The Edelbrock 12404 diaphragm is meticulously crafted from high-quality materials, ensuring durability and reliability.

This diaphragm features a large, flat, and smooth surface area to maximize the intake vacuum's efficiency. It is designed to provide a consistent vacuum reading across the entire surface, ensuring precise fuel delivery. The diaphragm's thickness is optimized to provide the right balance between sensitivity and durability, making it an ideal choice for high-performance applications.

The Edelbrock 12404 vacuum secondary diaphragm is easy to install, and it comes with clear installation instructions to ensure a hassle-free experience. It is important to note that this part is designed for use with vacuum secondary carburetors and should not be used with other types of carburetors.

In summary, the Edelbrock 12404 vacuum secondary diaphragm is a high-performance component that is essential for the proper functioning of Holley, Demon, and Quick Fuel carburetors with vacuum secondary systems. Its large, flat, and smooth surface area ensures maximum vacuum efficiency, while its optimized thickness provides the right balance between sensitivity and durability. This diaphragm is easy to install and is a must-have for anyone looking to get the most out of their performance engine.

Buying an Edelbrock 12404 Holley/Demon/Quick Fuel vacuum secondary diaphragm for your carburetor can offer several benefits, but it also comes with some potential drawbacks. Here are some pros and cons to consider:

1. Improved Carburetor Performance: This diaphragm is designed to provide better vacuum consistency, which can lead to improved carburetor performance. It can help maintain a more stable idle and improve throttle response.

2. Durability: The Edelbrock 12404 diaphragm is made from high-quality materials, which can help it last longer than some OEM parts. It's also reinforced to help prevent tearing or failure.

3. Easy Installation: This diaphragm is relatively easy to install, and it doesn't require any special tools or extensive mechanical knowledge.

1. Cost: The Edelbrock 12404 diaphragm is more expensive than some OEM parts. While the improved performance and durability may be worth the investment for some, others may prefer to save money and stick with the stock part.

2. Fitment: It's important to ensure that this diaphragm is compatible with your specific carburetor model and year. Edelbrock does offer several different part numbers to fit various applications, but it's essential to order the correct one to ensure a proper fit.

3. Potential for Overfueling: Some users have reported that this diaphragm can cause their carburetor to overfuel, particularly when idling. This can lead to rough running or other performance issues.

The Edelbrock 12404 Holley/Demon/Quick Fuel vacuum secondary diaphragm can offer improved carburetor performance, durability, and ease of installation. However, it comes with some potential drawbacks, such as cost, fitment concerns, and the risk of overfueling. Ultimately, whether or not this part is right for you depends on your specific application, budget, and performance goals. If you're looking to improve the vacuum consistency of your carburetor and are willing to invest in a high-quality part, the Edelbrock 12404 may be a good choice. However, if you're on a tight budget or have concerns about compatibility or overfueling, you may want to consider other options.

If you're considering purchasing an Edelbrock 12404 Holley/Demon/Quick Fuel vacuum secondary diaphragm, I would recommend doing your research to ensure that it's the correct part for your specific carburetor model and year. I would also suggest reading reviews from other users to get a better understanding of the potential benefits and drawbacks of this part. Finally, I would recommend considering the cost and your performance goals to determine if the investment in this part is worth it for you. If you're unsure, you may want to consult with a professional mechanic or carburetor specialist for advice.

part # 12404 prices

• $21.88-$26.87

specifications carbcaddie:

• brand: Edelbrock
• type: Carburetor Secondary Throttle Diaphragm
• country/region of manufacture: United States
• item length: 5.000
• upc: 085347124046
• manufacturer part number: 12404

offer carbcaddie:

• availability: In Stock
• quantity: 1
• sold: 0
• started: July 24, 2025
• options: Ship-to-home

general carbcaddie:

• Car Truck Parts Accessories > Air Fuel Delivery > Carburetor Parts
• condition: New

returns carbcaddie:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

seller carbcaddie:

• # reviews: 113926
• rating: 98.7%

payments carbcaddie:

• credit card: Mastercard
• other
• wallet: Paypal

shipping carbcaddie:

• transit: 2-6 Days
• class: Standard
• type: Fixed
• cost: $0.00
• service: Standard

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