HOLLEY 2BMB4778 Carburetor Body Cfm Double Pumper Racing 4150 4-BARREL

( Brand: Holley ), ( Type: Milled Choke Tower ), ( Manufacturer Part Number: 2BMB4778 ), ( Country Of Origin: United States )

Review HOLLEY 4150 4-barrel 2b 4778 Carburetor Main Body Cfm Double Pumper Racing fits 700

The Holley 2BMB4778 4150 4-barrel carburetor body is a high-performance component designed for applications requiring increased airflow and fuel delivery. This particular model is part of Holley's 2B series, which is specifically engineered for big-block Chevy applications.

This carburetor body boasts a flow rate of 700 CFM (cubic feet per minute), making it an excellent choice for high-performance engines that demand ample fuel and air mixture for efficient combustion. The 4150 series throttle bodies are known for their large, open design, ensuring a smooth and responsive throttle transition.

One of the key features of this Holley carburetor body is its double pumper design. The pumpers are responsible for creating the vacuum required to pull fuel from the float bowls and deliver it to the throttle plates via the metering rods. A double pumper setup provides improved fuel pressure and consistency, resulting in more reliable and stable engine performance.

The 2BMB4778 carburetor body is also compatible with Holley's various base plates and accessory drives, allowing for customization and integration with various engine setups. Additionally, it comes with a gasket and hardware kit for ease of installation.

Holley's commitment to precision manufacturing ensures that this carburetor body is built to the highest standards. The body is CNC-machined from billet aluminum, ensuring a perfect fit and finish. The metering rods and throttle plates are carefully calibrated to provide accurate fuel delivery and throttle response.

In summary, the Holley 2BMB4778 4150 4-barrel carburetor body is a high-flow, high-performance component designed for big-block Chevy applications. Its double pumper design, large 700 CFM flow rate, and compatibility with various Holley accessories make it a versatile and effective solution for high-performance engine builds.

The Holley 2bmb4778 4150 4-barrel 2b 4778 carburetor body 700 cfm double pumper racing is a popular choice among racers and performance enthusiasts due to its high flow rate and ability to provide consistent fuel delivery in high-performance applications. Here are some pros and cons of buying this carburetor:

1. High flow rate: This carburetor has a flow rate of 700 cfm, which is suitable for high-performance applications. It can provide enough fuel to support increased horsepower and torque.

2. Double pumper design: The double pumper design allows for better fuel pressure and consistency, which is essential for optimal engine performance.

3. Adjustability: This carburetor comes with adjustable jets, emulsion tubes, and power valves, allowing for fine-tuning of the fuel mixture for different driving conditions.

4. Durability: Holley carburetors are known for their durability and reliability, making them a popular choice among racers and performance enthusiasts.

1. Complexity: Due to its adjustability and high-performance design, this carburetor can be more complex to install and tune than some other carburetors.

2. Cost: This carburetor is more expensive than some other options on the market, which may be a consideration for some buyers.

3. Maintenance: Like all carburetors, this one requires regular maintenance, including adjustments and cleaning to ensure optimal performance.

The Holley 2bmb4778 4150 4-barrel 2b 4778 carburetor body 700 cfm double pumper racing is a high-performance carburetor that offers excellent flow rate, adjustability, and durability. However, it comes with a higher cost and complexity compared to some other options. If you are looking for a high-performance carburetor for your racing application and are willing to invest in the time and resources required for installation and tuning, then this carburetor may be a good choice for you. On the other hand, if you are looking for a more affordable and simpler option, you may want to consider a different carburetor. Ultimately, the decision comes down to your specific needs and budget.

part # 2bmb4778 price

• $64.00

specifications carbcaddie:

• for models: 700
• brand: Holley
• type: Milled Choke Tower
• manufacturer part number: 2BMB4778
• country of origin: United States

seller carbcaddie:

• # reviews: 35003
• rating: 100.0%

returns carbcaddie:

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

shipping carbcaddie:

• class: Standard
• service: USPS Ground Advantage
• carrier: USPS
• type: Calculated
• cost: $0.00
• transit: 4-8 Days

general carbcaddie:

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

offer carbcaddie:

• sold: 0
• started: June 10, 2026
• availability: In Stock
• quantity: 1
• best offers: True
• options: Ship-to-home

payments carbcaddie:

• credit card: Mastercard
• wallet: Google-pay
• other

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