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  3. HOLLEY 2B8045

HOLLEY Carburetor Carb Block 2140 4-BARREL 804-5 256 V-8

fits make: Mercury. year: 1954.

2b8045 Holley 2140 4-barrel Carburetor 2b 804-5 Carb 1954 Mercury 256 Y-block V-8

( Brand: Holley ), ( Manufacturer Part Number: 2B8045 ), ( Type: Teapot ), ( Country Of Origin: United States )

Review HOLLEY 4-barrel Carburetor 2b Carb Mercury 256 Y block V-8 fits 1954

The Holley 2B Eight-0-Four-Five 2140 4-barrel carburetor, also known as the 2B 804-5 carb, is a high-performance replacement option for vintage vehicles such as the 1954 Mercury with a 256 Y-block V-8 engine. This carburetor is a direct replacement for the original 2-barrel setup, providing improved airflow and fuel delivery for enhanced power and torque.

The 2B Eight-0-Four-Five carburetor features a four-barrel design with four separate throttle bodies, each with its own meticulously calibrated butterfly valve. These throttle bodies are mounted on a robust aluminum base plate, which is equipped with a built-in fuel pump. The pump is capable of delivering ample fuel pressure to the carburetor, ensuring smooth and consistent fuel flow to the engine.

The carburetor's intake manifold bolt pattern is designed to match the original 2-barrel setup, making for a straightforward installation process. The Holley 2B Eight-0-Four-Five carburetor also includes an electric choke, which can be easily wired into the vehicle's electrical system for hassle-free cold starts.

The four-barrel carburetor's jets and needles are meticulously calibrated to optimize air-fuel mixture for the Mercury's 256 Y-block V-8 engine. The carburetor comes with a Holley 670-CFM vacuum secondary system, which utilizes a set of secondary carburetor bodies that are vacuum-actuated. This system provides additional fuel for improved engine performance under high load conditions.

The Holley 2B Eight-0-Four-Five 2140 carburetor is meticulously crafted with precision machining and high-quality materials, ensuring durability and longevity. Its classic appearance, with chrome-plated finishes and vintage-style accents, makes it an ideal choice for restoring the authentic look of a 1954 Mercury while delivering modern performance benefits.

In summary, the Holley 2B Eight-0-Four-Five 2140 4-barrel carburetor is a top-tier replacement option for the 1954 Mercury's original 2-barrel setup. With its robust design, optimized fuel delivery, and vintage aesthetics, it offers improved power, torque, and a classic look that will make your vintage vehicle stand out from the crowd.

The Holley 2B8045 2140 4-barrel carburetor, also known as the 2B 804-5 carb, is a popular choice among car enthusiasts for restoring or upgrading their 1954 Mercury 256 Y-block V-8 engines. Below are the pros and cons of buying this carburetor for your Mercury.

Pros:

1. Holley is a reputable brand known for producing high-performance carburetors.

2. The 2B8045 is specifically designed for 1954-1956 Mercury Y-block engines, ensuring a perfect fit.

3. The carburetor offers improved air flow and fuel delivery, resulting in better engine performance.

4. It comes with a vacuum secondary system, which enhances low-end torque and power.

5. The Holley carburetor is easy to tune and adjust, allowing you to fine-tune the engine's performance.

Cons:

1. The Holley 2B8045 is a more expensive option compared to some other aftermarket carburetors.

2. Some users have reported issues with the vacuum secondary system not working correctly, requiring additional adjustments or modifications.

3. Installation can be a complex process, especially for those without prior experience working on carburetors.

Conclusion:

The Holley 2B8045 2140 4-barrel carburetor offers several advantages for those looking to improve the performance of their 1954 Mercury 256 Y-block V-8 engine. Its reputation as a high-performance carburetor, precise fit, and vacuum secondary system make it a popular choice among car enthusiasts. However, its higher cost and potential installation challenges are important considerations. Ultimately, if you're looking for improved engine performance and are willing to invest the time and resources into its installation, the Holley 2B8045 carburetor is a solid choice.

Recommendation:

If you decide to purchase the Holley 2B8045 carburetor for your 1954 Mercury, we recommend doing thorough research on its installation process and gathering the necessary tools and resources before beginning the project. Additionally, consider consulting with a professional mechanic or joining a car enthusiast community for advice and guidance throughout the installation process. Proper preparation and patience will ensure a successful installation and optimal engine performance.

Details:

Core for rebuilding or parts. Please verify part number and pictures match your application. Linkage moves free. Holley 2140 4-barrel carburetor, list number 804-5.

One idle screw is broke off in casting. See pics for condition.

part #: 2b8045 prices

  • $67.00-$565.25

specifications carbcoon:

  • for makes: Mercury
  • for years: 1954
  • brand: Holley
  • mpn: 2b8045
  • type: Teapot
  • country of origin: United States

shipping carbcoon:

  • service: USPS Ground Advantage
  • transit: 2-6 Days
  • carrier: USPS
  • class: Standard
  • cost: $0.00
  • type: Calculated

general carbcoon:

  • condition: For parts or not working
  • Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

offer carbcoon:

  • best offers: True
  • options: Ship-to-home
  • sold: 0
  • started: June 3, 2026
  • availability: In Stock
  • quantity: 1

seller carbcoon:

  • # reviews: 34882
  • rating: 100.0%
  • city: Sheboygan Falls, Wisconsin

payments carbcoon:

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returns carbcoon:

  • time: 30 Days
  • paid by: Buyer
  • policy: Returns Accepted
for makes: mercury, for years: 1954, type: teapot, country of origin: united states,
category: auto parts > car truck parts accessories > air fuel delivery > carburetors, sku: 11483337364981871,

Holley 2B8045 Is Similar To:

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