HOLLEY Dominator Carburetor 9377-1/1150CFM/4500

( Brand: Holley ), ( Manufacturer Part Number: 9377-1 ), ( Non-domestic Product: No ), ( Type: Carburetor ), ( Manufacturer Warranty: 90 Day ), ( Fitment Type: Performance/custom ), ( Modified Item: Yes ), ( Country Of Origin: United States )

Review HOLLEY Hp 9377-1/1150cfm/4500 Dominator Carburetor

The Holley 9377-1 HP carburetor, also known as the 4500 Dominator, is a high-performance, four-barrel carburetor that is ideal for street rods, hot rods, and muscle cars. This carburetor is designed to deliver excellent airflow and fuel delivery for increased horsepower and torque.

The Holley 4500 Dominator features a unique design with a large, 1150 CFM primary venturi and four 750 CFM secondary venturis. The primary venturi is designed to provide rich fuel mixtures for smooth idling and quick throttle response, while the secondary venturis deliver the additional fuel required for high RPM power.

The Holley 4500 Dominator is equipped with Holley's advanced vacuum secondary system, which provides a smooth, progressive powerband by allowing the secondary circuits to open gradually as vacuum increases. This system also helps prevent surge and fuel starvation during acceleration.

The carburetor comes with Holley's Synergy base plate, which allows for easy tuning and adjustment. The base plate is also designed to provide excellent intake manifold sealing and eliminate the need for choke tubes or power valves.

The Holley 9377-1 HP carburetor is constructed from high-quality materials for durability and reliability. The body is made from cast aluminum, and the components are made from billet aluminum and stainless steel. The carburetor also features heavy-duty diaphragms and gaskets for improved sealing and longevity.

The Holley 4500 Dominator is easy to install and can be used with a variety of fuel systems, including electric and mechanical fuel pumps. The carburetor also comes with a full set of mounting hardware and instructions for easy installation.

Overall, the Holley 9377-1 HP 4500 Dominator carburetor is a high-performance, reliable, and easy-to-use option for anyone looking to enhance the power and performance of their hot rod or muscle car. With its large airflow capacity, advanced vacuum secondary system, and durable construction, this carburetor is sure to provide impressive results on the track or the street.

The Holley 9377-1 HP / 9377-1/1150 CFM / 4500 Dominator carburetor is a popular choice for automotive enthusiasts looking to improve the performance of their engine. Here are some pros and cons that may help you make an informed decision about whether this carburetor is right for you:

1. High Flow Design: The Holley Dominator carburetor is known for its high flow design, which can provide increased horsepower and torque compared to stock carburetors.

2. Fuel Efficiency: This carburetor is designed to provide excellent fuel efficiency, which can save you money on gas over time.

3. Adjustability: The Holley Dominator carburetor offers a wide range of adjustability, allowing you to fine-tune the air/fuel mixture for optimal performance.

4. Durability: Holley carburetors are known for their durability, and the Dominator is no exception. It is built to withstand the rigors of high-performance applications.

5. Easy Installation: The Holley Dominator carburetor is relatively easy to install, making it a popular choice for DIY enthusiasts.

1. Cost: The Holley Dominator carburetor is more expensive than some other options on the market.

2. Complexity: Compared to some other carburetors, the Holley Dominator can be more complex to set up and tune.

3. Maintenance: Like any carburetor, the Holley Dominator requires regular maintenance to ensure optimal performance.

In conclusion, the Holley 9377-1 HP / 9377-1/1150 CFM / 4500 Dominator carburetor offers several benefits for high-performance applications, including increased horsepower, fuel efficiency, and adjustability. However, it also comes with some drawbacks, such as cost, complexity, and maintenance requirements. Ultimately, whether this carburetor is right for you will depend on your specific needs and budget.

If you are looking for a high-performance carburetor that offers excellent flow rates, adjustability, and durability, the Holley Dominator is definitely worth considering. However, if you are on a tight budget or prefer a simpler, less expensive option, you may want to explore other alternatives.

Recommendation: If you are serious about improving the performance of your engine and are willing to invest in a high-quality, high-flow carburetor, the Holley 9377-1 HP / 9377-1/1150 CFM / 4500 Dominator carburetor is an excellent choice. However, if you are on a budget or prefer a simpler, less expensive option, you may want to consider alternatives such as a double pumper or quadrajet carburetor. Ultimately, the best choice will depend on your specific needs and preferences.

Details:

This is an actual photo of the carb. Is a total rebuild, in like new condition, and ready to install. Holley HP, dominator 4500/9377-1/1150 cfm /gas carburetor, mechanical secondary, 3 circuit, 50cc accelerator pumps, 4 corner idle, jet extensions with notched notarial secondary float for hard rapid acceleration, Tyson seals on the idle mixture screws, was totally disassembled, vibratory cleaned and polished in a filtered soap water solution, thoroughly gone over, bottom of base mounting flange has been resurfaced, We installed some jets top carb. #39 Holley HP dominator 4500/9377-1/1150 cfm carburetor.

To clean up the idle on big clammed engines, you can change those jets easily to your engine needs, like ex feature some carbs. Are not only good at the track but also make great street carbs. But easier to change with the jets.

part #: 93771 prices

• $69.95-$750.00

specifications carbcoon:

• brand: Holley
• mpn: 9377-1
• non-domestic product: No
• type: Carburetor
• manufacturer warranty: 90 Day
• fitment type: Performance/custom
• modified item: Yes
• country of origin: United States

general carbcoon:

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

shipping carbcoon:

• type: Fixed
• cost: $35.80
• transit: 5-11 Days
• carrier: USPS
• service: USPS Priority Mail Large Flat Rate Box
• class: Expedited

seller carbcoon:

• rating: 100.0%
• # reviews: 3038
• city: Honesdale, Pennsylvania

offer carbcoon:

• availability: In Stock
• options: Ship-to-home
• quantity: 1
• sold: 0
• started: May 9, 2026

returns carbcoon:

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

payments carbcoon:

• wallet: Paypal
• credit card: Diners-club
• other

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