HOLLEY HR-720 Carburetor

( Brand: Holley ), ( Type: Carburetor ), ( 7/15/25: 2025 ), ( Manufacturer Part Number: HR-720 ), ( Material: Steel ), ( Item Length: Oem ), ( Universal Fitment: No )

Review HOLLEY Carburetor Co Part Number Genuine Oem Used

The Holley HR-720 Carburetor is a high-performance fuel delivery system engineered for vintage hot rods and muscle cars. This 2-barrel carburetor delivers precise fuel metering for exceptional engine performance and drivability. Its unique design incorporates a number of advanced features for optimal fuel delivery in a wide range of applications.

The HR-720 Carburetor boasts a 750 CFM secondary venturi and a 650 CFM primary venturi, providing ample fuel capacity for large engines. Its vacuum-secondary design delivers excellent idle stability and smooth power delivery throughout the RPM range. Additionally, it includes Holley's Ultra-Lite Secondary (ULS) system, which reduces secondary diaphragm weight for quicker throttle response and improved fuel efficiency.

The HR-720 Carburetor features a heavy-duty aluminum base with a cast aluminum intake manifold, ensuring durability and long-lasting performance. Its adjustable power valves provide fine-tuning capabilities for different engine configurations and driving conditions. The carburetor also includes a built-in fuel pressure regulator, eliminating the need for an external regulator, and a removable fuel bowl for easy access during tuning.

Holley's HR-720 Carburetor is designed to work seamlessly with a variety of fuel systems, including electronic fuel injection, mechanical fuel pumps, and even vacuum pumps. Its versatility, combined with its high-performance capabilities, makes it an excellent choice for both street and racing applications. With its comprehensive adjustability options, the HR-720 Carburetor allows enthusiasts to fine-tune their engine's fuel delivery for optimal power and efficiency.

In summary, the Holley HR-720 Carburetor is a high-performance, versatile fuel delivery system that delivers precise fuel metering for vintage hot rods and muscle cars. Its advanced features, such as vacuum-secondary design, adjustable power valves, and built-in fuel pressure regulator, provide optimal fuel delivery and flexible tuning capabilities for various engine configurations and driving conditions. The HR-720 Carburetor's heavy-duty construction and compatibility with various fuel systems make it an essential component for any serious hot rod or muscle car enthusiast.

The Holley HR-720 carburetor is a popular choice among hot rod and performance car enthusiasts due to its high-performance capabilities. However, like any other automotive component, it comes with its own set of advantages and disadvantages.

1. High-performance: The Holley HR-720 carburetor is known for its ability to deliver excellent air/fuel mixtures, making it ideal for high-performance applications.

2. Customizability: Holley offers a wide range of options and configurations for the HR-720, allowing users to tailor the carburetor to their specific engine and driving requirements.

3. Durability: The HR-720 is built with high-quality materials and is designed to withstand the rigors of high-performance driving.

4. Easily adjustable: The carburetor features easy-to-adjust components, making it simple to fine-tune the air/fuel mixture for optimal engine performance.

1. Complexity: The Holley HR-720 is a complex carburetor, and setting it up correctly requires a good understanding of carburetion and engine tuning.

2. Cost: The HR-720 is a high-performance carburetor and comes with a premium price tag.

3. Maintenance: The HR-720 requires regular maintenance to ensure optimal performance, including routine adjustments and cleaning.

The Holley HR-720 carburetor is a high-performance component that offers excellent air/fuel mixtures, customizability, durability, and ease of adjustability. However, its complex setup, premium cost, and ongoing maintenance requirements may be a deterrent for some enthusiasts.

If you're looking for a high-performance carburetor and are willing to invest the time and resources into setting it up correctly, the Holley HR-720 is an excellent choice. However, if you're new to carburetion or looking for a more affordable option, there may be other carburetors that better suit your needs.

part # hr720 prices

• $95.00-$198.00

specifications carbcaddie:

• brand: Holley
• type: Carburetor
• 7/15/25: 2025
• manufacturer part number: HR-720
• material: Steel
• item length: Oem
• universal fitment: No

returns carbcaddie:

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

shipping carbcaddie:

• service: Standard
• type: Fixed
• transit: 2-6 Days
• class: Standard
• cost: $0.00

payments carbcaddie:

• wallet: Paypal
• other
• credit card: Discover

seller carbcaddie:

• # reviews: 2258
• rating: 99.3%

general carbcaddie:

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

offer carbcaddie:

• quantity: 1
• options: Ship-to-home
• sold: 0
• best offers: True
• availability: In Stock
• started: July 15, 2025

Holley HR-720 Is Similar To:

• Ford D0of-9510-n 1970 Cobra Jet 429 Scj Manual 4 Speed Holley Carburetor List 4627 As Is (30.6% similar) $223.99–$2672.99. (August 23rd, 2024)
• Holley 12r-5204b Carburetor Throttle Base Plate #0559 (53.2% similar) $30.00–$190.68. (August 23rd, 2024)
• Holley 12r-4251b Carburetor Throttle Base Plate #0574 (51.4% similar) $24.95–$35.00. (August 23rd, 2024)
• Holley 3887686 2 Bbl 500 Cfm Marine Carburetor Volvo Penta 4.3l For Parts Or Rebuild (47.1% similar) $159.99–$400.00. (August 23rd, 2024)
• Holley 36-181 Carburetor Metering Jet 2 Of Each Size Contact Prior Ordering (47.3% similar) $34.88–$96.83. (August 24th, 2024)
• Holley 8485-1947 Primary Front Metering Block 18502 600 Vacuum Secondary Carburetor (30.2% similar) $20.00–$199.00. (August 24th, 2024)
• Holley 37-1536 Carburetor Renew Kit 4160 (52.1% similar) $199.95–$211.06. (August 25th, 2024)
• Holley 80457-2 List Carburetor 600cfm 4bbl 4160 Main Body Only With New Gasket (34.3% similar) $8.35–$11.25. (August 26th, 2024)
• Holley 61601 Carburetor Metering Block Stamped 6835 And #0579 (49.6% similar) $19.50–$90.64. (August 26th, 2024)
• Holley 34r-10880b Carburetor Choke Assembly 41r-953b #0564 (49.1% similar) $40.02. (August 26th, 2024)
• Holley 6075-28 Carburetor Metering Block Stamped 6075 28 #0575 (49.2% similar) $26.99. (August 26th, 2024)