HOLLEY Carburetor Secondary Block Cfm 4150 4-BARREL 4777

( Brand: Holley ), ( Type: Double Pumper ), ( Manufacturer Part Number: 2B6497 ), ( Country Of Origin: United States )

Review HOLLEY 4150 4-barrel Carburetor Secondary Metering Block Cfm 2b 6497 fits 650

The Holley 2B6497 4150 4-barrel 4777 CFM carburetor secondary block is a high-performance component designed for enhancing the fuel delivery system in specific applications. This secondary block is engineered to work with Holley's 4150 series 4-barrel carburetors and is ideal for engines requiring increased airflow and fuel delivery, such as high-performance applications.

This secondary block, carrying the part number 2B6497, is CNC-machined from billet aluminum for precision and durability. It is specifically designed to accommodate a 4777 CFM secondary venturi, making it an excellent choice for high-horsepower applications. The increased airflow provided by this secondary block can lead to improved engine performance, responsiveness, and power output.

The 2B6497 secondary block features a 650 CFM primary venturi, which ensures proper fuel delivery to the engine under normal operating conditions. It also comes with an adjustable secondary metering rod, allowing users to fine-tune the fuel mixture for optimal performance. The secondary block is also equipped with a removable secondary bowl, making it easier for users to perform maintenance and adjustments.

The Holley 2B6497 4150 4-barrel 4777 CFM carburetor secondary block is designed to provide excellent fuel atomization, ensuring a consistent fuel-air mixture for efficient combustion. It is also compatible with Holley's various fuel systems, including electric and mechanical fuel pumps.

In summary, the Holley 2B6497 4150 4-barrel 4777 CFM carburetor secondary block is a high-performance component that enhances the fuel delivery system of Holley 4150 series 4-barrel carburetors. Its CNC-machined billet aluminum construction, 650 CFM primary venturi, and 4777 CFM secondary venturi make it suitable for high-horsepower applications, while its adjustable secondary metering rod and removable secondary bowl provide the flexibility needed for fine-tuning and maintenance.

The Holley 2B6497 4150 4-barrel 4777 carburetor secondary block, with a secondary venturi size of 4777 cfms and a primary venturi size of 650 cfms, is a popular choice among performance enthusiasts for their hot rods and custom builds. This carburetor offers several advantages and disadvantages that are essential to consider before making a purchase.

1. High Flow Rate: The Holley 2B6497 carburetor offers a high flow rate, making it an excellent choice for high-performance applications. The secondary venturi's large size allows for an increased fuel delivery rate, resulting in better throttle response and increased power output.

2. Customizable: Holley carburetors are known for their high level of customization. The 2B6497 model is no exception, with various options for jetting, emulsion tubes, and base gaskets, allowing users to fine-tune the carburetor to their specific engine and performance requirements.

3. Durable: Holley carburetors are built to last, with high-quality materials and precise manufacturing processes. The 2B6497 model features a cast aluminum body, hardened steel floats, and heavy-duty diaphragms, making it a reliable choice for long-term use.

4. Easy to Install: The Holley 2B6497 carburetor comes with a secondary block, making it a direct bolt-on replacement for many applications. This can save time and effort during the installation process.

1. Complexity: Holley carburetors can be complex to set up and tune, especially for those without prior experience. The 2B6497 model, with its multiple adjustment options, may require extensive research and experimentation to achieve optimal performance.

2. Cost: The Holley 2B6497 carburetor is more expensive than some other options on the market. While it offers superior performance and customization options, the cost may be a deterrent for some buyers.

3. Requires Regular Maintenance: Carburetors, in general, require regular maintenance to ensure optimal performance. The Holley 2B6497 is no exception, requiring frequent checks of the fuel mixture, jetting, and other adjustments to maintain peak performance.

The Holley 2B6497 4150 4-barrel 4777 carburetor secondary block is a high-performance carburetor that offers several advantages, such as a large flow rate, customizability, durability, and ease of installation. However, it also comes with some disadvantages, including complexity, cost, and the need for regular maintenance. Ultimately, the decision to purchase this carburetor depends on the individual's specific needs, budget, and performance goals.

If you are looking for a high-performance carburetor for your hot rod or custom build, and you are willing to invest time and money into its setup and maintenance, the Holley 2B6497 4150 4-barrel 4777 carburetor secondary block is an excellent choice. Its large flow rate, customizable options, and durable construction make it a reliable and powerful addition to any engine. However, if you are on a tight budget or prefer a simpler, less expensive option, there are other carburetor models on the market that may better suit your needs.

part # 2b6497 prices

• $45.00-$628.95

specifications carbcaddie:

• for models: 650
• brand: Holley
• type: Double Pumper
• manufacturer part number: 2B6497
• country of origin: United States

offer carbcaddie:

• availability: In Stock
• quantity: 1
• options: Ship-to-home
• best offers: True
• sold: 0
• started: June 6, 2026

general carbcaddie:

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

returns carbcaddie:

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

shipping carbcaddie:

• class: Standard
• transit: 10-17 Days
• type: Calculated
• carrier: USPS
• cost: $0.00
• service: USPS Ground Advantage

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seller carbcaddie:

• rating: 100.0%
• # reviews: 34934

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