HOLLEY FR-4777S Double Pumper Carburetor 090127649053

( Brand: Holley ), ( Manufacturer Part Number: FR-4777S ), ( Part Type: Carburetor ), ( Material: Aluminum ), ( UPC: 090127649053 )

Review HOLLEY Double Pumper Carburetor Factory Refurbished

The Holley FR-4777S Double Pumper Carburetor is a high-performance fuel delivery system designed for serious hot rodders and racers. This carburetor features Holley's proven double pumper technology, which provides increased vacuum and fuel delivery for improved engine performance.

The FR-4777S is a 4-barrel carburetor, which means it has four separate barrels for delivering fuel to each cylinder. Each barrel is equipped with a 750 CFM vacuum secondary and a 450 CFM primary venturi, allowing for a wide range of power delivery and fine-tuning capabilities. The secondary venturis are controlled by vacuum, creating a powerful vacuum secondaries system that provides additional fuel for high-RPM operation.

This carburetor also includes Holley's Ultra Lite Secondaries, which are lighter in weight and feature a unique design for improved airflow and power. The Ultra Lite Secondaries are also removable, making them easy to service or replace if needed.

The FR-4777S Double Pumper Carburetor is constructed from high-quality materials, including a billet aluminum base and brass bodies. It also features a heavy-duty floats and a precision-machined throttle shaft for durability and reliability.

The carburetor comes with a Holley 0-8000 vacuum secondary kit, which includes a vacuum pump, a power valve, and all necessary hardware for installation. It also includes a Holley HP Series Intake Manifold, which is designed to provide excellent intake flow and power.

The FR-4777S Double Pumper Carburetor is easy to install and adjust, with a simple nut-and-bolt design and clear markings for easy tuning. It also includes a Holley Carburetor Calibration Chart, which can be used to help set the carburetor for optimal performance.

Overall, the Holley FR-4777S Double Pumper Carburetor is a high-performance fuel delivery system that provides powerful vacuum secondaries and excellent tuning capabilities. It is constructed from durable materials and is easy to install and adjust, making it an excellent choice for serious hot rodders and racers.

The Holley FR-4777S Double Pumper Carburetor is a popular choice among automotive enthusiasts for its ability to deliver consistent and powerful fuel delivery to high-performance engines. Here are some pros and cons to consider before making a purchase.

1. High Flow Design: The Holley Double Pumper carburetor is designed to flow a large volume of fuel, making it an excellent choice for high-performance applications.

2. Fuel Efficiency: Despite its high-flow design, the carburetor is known for its fuel efficiency, which can lead to improved gas mileage and reduced emissions.

3. Easy-to-Tune: The Holley Double Pumper carburetor comes with a built-in choke and a secondary circuit that can be easily tuned for optimal performance.

4. Durable Construction: The carburetor is made with high-quality materials, including a billet aluminum base and stainless steel components, making it durable and long-lasting.

5. Versatile: The Holley Double Pumper carburetor is available in various sizes and configurations to fit a wide range of applications.

1. Complex Installation: Installing the Holley Double Pumper carburetor can be a complex process, requiring extensive knowledge of fuel systems and carburetor tuning.

2. Expensive: Compared to other carburetors, the Holley Double Pumper carburetor is more expensive, which may be a deterrent for some buyers.

3. Requires Regular Maintenance: The Holley Double Pumper carburetor requires regular maintenance to ensure optimal performance, including regular cleaning and adjustments.

The Holley FR-4777S Double Pumper Carburetor is a high-performance carburetor that delivers consistent fuel delivery and is known for its fuel efficiency. However, it comes with a complex installation process, a higher price tag, and requires regular maintenance. If you are looking for a high-performance carburetor and have the knowledge and resources to install and maintain it, then the Holley Double Pumper carburetor is an excellent choice. If not, you may want to consider other options that are easier to install and maintain.

If you are looking for a high-performance carburetor and have the necessary knowledge and resources to install and maintain it, then the Holley FR-4777S Double Pumper Carburetor is an excellent choice. However, if you are looking for a more user-friendly option, you may want to consider other carburetors that are easier to install and maintain, such as a single-plane carburetor or a quadrajet carburetor. Ultimately, the best choice depends on your specific application, budget, and level of expertise.

Details:

Buyer pays return shipping. A signature is required on all UPS orders over $750. Mechanical secondaries for awesome tire turning performance. 100% wet-flow tested by Holley technicians to assure it arrives ready run.

Dual feed fuel inlet's for constant high volume delivery. Manual choke Cable driven, hand operated for precise cold start control. Optimized street/strip calibration that works out-of-the-box.

part #: fr4777s prices

• $151.99-$699.95

specifications carbcoon:

• brand: Holley
• mpn: Fr-4777s
• part type: Carburetor
• material: Aluminum
• upc: 090127649053

seller carbcoon:

• city: Bowling Green, Kentucky
• rating: 99.4%
• # reviews: 10951

general carbcoon:

• condition: Remanufactured
• Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

shipping carbcoon:

• transit: 3-7 Days
• service: UPS Ground
• type: Fixed
• class: Standard
• carrier: UPS
• cost: $0.00

payments carbcoon:

• wallet: Apple-pay
• other
• credit card: Visa

returns carbcoon:

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

offer carbcoon:

• sold: 0
• availability: In Stock
• started: January 21, 2026
• quantity: 1
• options: Ship-to-home

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