HOLLEY 0-80812HBX Ultra Circle Track Carburetor 650CFM

( Brand: Holley ), ( Manufacturer Part Number: 0-80812HBX ), ( Type: Carburetor ), ( Mounting Flange Type: Square Bore ), ( Manufacturer Warranty: Manufacturers Limited 90 Day Warranty ), ( Material: Aluminum ), ( Performance Part: Yes )

Review HOLLEY 650cfm Ultra Circle Track Carburetor fits XP

Introducing the Holley 0-80812HBX 650 CFM Ultra XP Circle Track Carburetor, a high-performance carburetor engineered for circle track racing applications. This carburetor is part of Holley's Ultra XP series, which is renowned for its ability to deliver consistent power and excellent fuel economy.

The Holley 650 CFM Ultra XP Circle Track Carburetor boasts a number of advanced features designed to give racers an edge on the track. One of these features is the Ultra XP Dominator bowl, which offers increased flow capacity and an improved fuel distribution system. This results in better atomization, improved combustion efficiency, and more power.

Another notable feature of this carburetor is its adjustable accelerator pump. This feature allows racers to fine-tune the fuel delivery system for their specific racing conditions. The pump is adjustable both in duration and height, providing ultimate flexibility and control.

The Holley 0-80812HBX also comes with a removable float bowl, which makes it easier to service and maintain. The bowl is made of billet aluminum, ensuring durability and longevity. The carburetor also features a vacuum secondaries system, which allows for smooth power delivery across the entire RPM range.

The Ultra XP Circle Track Carburetor is designed with a high-flowing 1 3/4-inch primary venturi, which provides excellent vacuum and a large fuel passage. The secondary venturis are also generously sized at 2 1/4 inches, ensuring ample fuel delivery during wide-open throttle conditions.

This carburetor is also compatible with Holley's EFI Fuel Pressure Regulators, making it an excellent choice for racers looking to convert their carbureted setup to EFI. The Ultra XP series is also known for its ease of tuning, making the transition to EFI a seamless one.

In summary, the Holley 0-80812HBX 650 CFM Ultra XP Circle Track Carburetor is a high-performance, adjustable carburetor designed specifically for circle track racing applications. With its advanced features, such as the Ultra XP Dominator bowl, adjustable accelerator pump, and vacuum secondaries system, this carburetor delivers consistent power and excellent fuel economy. Its durable design and ease of maintenance make it an excellent choice for racers looking to gain an edge on the track.

The Holley 0-80812HBX 650 CFM Ultra XP Circle Track Carburetor is a popular choice among racers and performance enthusiasts due to its high flow rates, adjustability, and durability. However, like any product, it has its pros and cons.

1. High Flow Rates: The Holley Ultra XP Circle Track Carburetor is designed for high-performance applications. It can deliver large amounts of fuel to high-horsepower engines, making it an excellent choice for circle track racing and other competitive applications.

2. Adjustability: The carburetor comes with a removable power valve and adjustable power valve plate, which allows for fine-tuning of the fuel mixture for various racing conditions. It also has a built-in adjustable idle circuit, making it easier to set up and maintain the idle speed.

3. Durability: The carburetor housing is made of billet aluminum, which is lighter and stronger than traditional cast aluminum. It also features heavy-duty internal components, including hard anodized pushrods, needle and seat assemblies, and fuel bowls, which can withstand the rigors of racing.

4. Easy Installation: The Holley Ultra XP Circle Track Carburetor comes with a number of installation accessories, including a float bowl gasket set, fuel bowl mounting hardware, and a throttle linkage bracket. This makes installation easier and more straightforward.

1. Complexity: The Holley Ultra XP Circle Track Carburetor is a complex piece of machinery, with numerous adjustments and components. This can make it more difficult to set up and tune compared to simpler carburetors.

2. Cost: The carburetor is more expensive than many other aftermarket carburetors, due to its high-performance features and durable construction.

3. Maintenance: Due to its complexity and high-performance features, the Holley Ultra XP Circle Track Carburetor requires more frequent maintenance than some other carburetors. This includes regular checks of the fuel mixture, adjustments to the power valve and idle circuit, and replacement of worn parts.

The Holley 0-80812HBX 650 CFM Ultra XP Circle Track Carburetor is a high-performance carburetor that offers excellent flow rates, adjustability, and durability. However, its complexity and cost make it a better choice for dedicated racers and performance enthusiasts rather than casual drivers. If you're looking for a simple and cost-effective carburetor, there may be other options that better suit your needs.

If you're a serious racer or performance enthusiast looking for a high-flow, adjustable carburetor that can handle the demands of competitive applications, the Holley 0-80812HBX 650 CFM Ultra XP Circle Track Carburetor is an excellent choice. Its durability, ease of installation, and high-performance features make it a top contender for those seeking the ultimate racing carburetor. However, if you're looking for a more affordable or simpler option, there are other carburetors on the market that may better suit your needs.

Details:

The Aluminum Ultra XP Circle Tracks are available in 650 750 cfm 's. Holley Ultra XP carburetors are the ultimate in square bore race. They re available in our Hard Core Gray hard coat anodized finish with Black billet for improved corrosion protection also natural tumble-polished aluminum metering blocks and base plate. Holley Ultra XP Carburetor 0-80812HBX Extreme Performance - Circle Track Carburetors.

Ultra XP carbs are 38% lighter than our original HP, have fuel capacity that is 20% greater and 30 other new features. Holley Ultra XP carburetors are Specifically Calibrated for Circle Track offer new features such as anti-siphon valve in the main body; high capacity HP bowls which feature 20% more fuel to eliminate starvation, integrated shelf minimize aeration and internal baffling control slosh. Other features include all aluminum construction, fully unable billet metering blocks, base plate, wedge floats, adjustable secondary linkage and knurled hand adjustable curb idle screws.

part #: 080812hbx prices

• $69.95-$79.99

specifications carbcoon:

• for models: Xp
• brand: Holley
• mpn: 0-80812hbx
• type: Carburetor
• mounting flange type: Square Bore
• manufacturer warranty: Manufacturers Limited 90 Day Warranty
• material: Aluminum
• performance part: Yes

seller carbcoon:

• # reviews: 762
• rating: 100.0%
• city: Florida, New York

shipping carbcoon:

• class: Standard
• service: FedEx Ground / FedEx Home Delivery
• type: Fixed
• carrier: FedEx
• cost: $12.95
• transit: 2-5 Days

offer carbcoon:

• options: Ship-to-home
• best offers: True
• sold: 0
• quantity: 1
• started: October 22, 2025
• availability: In Stock

general carbcoon:

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

payments carbcoon:

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

returns carbcoon:

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

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