HOLLEY LIST-4781-2 Double Pumper Carburetor Rebuild 850CFM

( Brand: Holley ), ( Manufacturer Part Number: LIST-4781-2 ), ( Choke Type: Manual ), ( Type: Carburetor ), ( Mounting Flange Type: Square Bore ), ( Features: Model 4150 )

Review HOLLEY Double pumper Carburetor #list-4781-2 850cfm Rebuild Parts

The Holley 850 CFM Double-Pumper Carburetor Model Number: LS-4781-2 is a high-performance carburetor designed for serious racers and hot rod enthusiasts. This carburetor is part of Holley's LS Series, which offers improved idle stability, easier tuning, and increased power output.

The 850 CFM double-pumper design features two four-barrel carburetor bodies that are mounted on a single flange. Each carburetor body is equipped with an individual floater bowl, providing consistent fuel delivery to each cylinder bank. The double-pumper design also ensures a smoother idle and improved throttle response.

The Holley LS-4781-2 carburetor comes with a rebuild kit, which includes all the necessary parts to rebuild the carburetor to factory specifications. The kit includes new gaskets, needles, jets, float bowls, and other critical components. The rebuild process is designed to be straightforward, making it an ideal option for those looking to rebuild their carburetor themselves.

The Holley LS-4781-2 carburetor features a vacuum secondary system that utilizes a unique electric choke system. This system allows for easier starting, especially in cold conditions, and eliminates the need for a traditional manual choke. The vacuum secondary system also provides a more consistent fuel mixture during acceleration, resulting in improved power and performance.

The Holley LS-4781-2 carburetor is designed for use with GM LS-series engines, including the LS1, LS2, LS3, LS4, LS6, LS7, and LS9 engines. It is suitable for both natural aspiration and forced induction applications, making it a versatile option for a wide range of performance builds.

In summary, the Holley LS-4781-2 Double-Pumper Carburetor is a high-performance, rebuildable carburetor designed for serious racers and hot rod enthusiasts. With a double-pumper design, vacuum secondary system, and included rebuild kit, this carburetor offers improved power, consistency, and ease of use for those looking to take their LS-series engine to the next level.

The Holley 4160 Series Double-Pumper Carburetor, model number 850cfm rebuild (part number 4781-2), is a popular choice for high-performance applications. Like any automotive component, it has its advantages and disadvantages.

1. High Flow: The 850cfm (cubic feet per minute) rating makes this carburetor suitable for high-performance engines that require large airflow.

2. Versatility: It is compatible with a wide range of fuel systems and can be used with various fuel additives.

3. Adjustability: Holley carburetors are known for their ease of tuning and adjustability, allowing you to fine-tune the air/fuel mixture for optimal performance.

4. Durability: Holley carburetors are built to withstand the rigors of high-performance applications, with robust construction and high-quality materials.

5. Availability: Holley carburetors are widely available, making it easier to find replacement parts and service if needed.

1. Complexity: Holley carburetors, especially high-performance models like the 850cfm Double-Pumper, can be more complex to set up and tune compared to simpler designs.

2. Cost: The Holley 4781-2 carburetor is a premium product, and its price reflects its high-performance capabilities.

3. Fuel Economy: High-performance carburetors, in general, are not known for their fuel efficiency. Using this carburetor may result in lower fuel economy compared to stock or smaller carburetors.

4. Cold Starting: Double-pumper carburetors can be more challenging to start in cold temperatures due to their design.

5. Maintenance: Holley carburetors require regular maintenance to ensure optimal performance.

The Holley 4781-2 850cfm Double-Pumper Carburetor is an excellent choice for high-performance applications that require large airflow. Its advantages include versatility, adjustability, durability, and availability. However, it comes with some disadvantages, such as complexity, cost, fuel economy, and cold starting challenges. Considering these factors, if you're looking for a high-performance carburetor for your project, the Holley 4781-2 could be an excellent investment. However, be prepared for the potential challenges and the ongoing maintenance required.

Details:

This is an original Holley carburetor, not late model imitation junk from China good luck, beware of those. It will need a rebuild or use for parts. This model is a square bore design with mechanical secondaries, externally adjustable floats, and manual choke. You are buying on a Holley model 4150 Double-Pumper four-barrel carburetor, stamped P/N# LIST-4781-2, date code 0753, rated at 850 cfm .

It is used, throttle plates and choke are free, not seized, it missing the lever, see pictures.

part #: list47812 prices

• $105.00-$650.00

specifications carbcoon:

• brand: Holley
• mpn: List-4781-2
• choke type: Manual
• type: Carburetor
• mounting flange type: Square Bore
• features: Model 4150

offer carbcoon:

• options: Ship-to-home
• started: August 22, 2025
• quantity: 1
• availability: In Stock
• sold: 0

general carbcoon:

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

returns carbcoon:

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

shipping carbcoon:

• carrier: FedEx, USPS
• service: FedEx Ground / FedEx Home Delivery, USPS Priority Mail, USPS Ground Advantage
• transit: 4-8 Days
• type: Calculated
• cost: $57.48
• class: Standard, Expedited

payments carbcoon:

• wallet: Google-pay
• credit card: Diners-club
• other

seller carbcoon:

• rating: 100.0%
• # reviews: 13254
• city: Rumford, Rhode Island

Holley LIST-4781-2 Is Similar To:

• Holley 4557 Ls6 L78 396 454 Carburetor 3967477-gg 1970 Chevelle Camaro Nova (43.6% similar) She was removed off of a running BBC motor but has been sitting for few months. It has not been tested and could possibly need work, labor, other parts/materials before use. May be shipped via ups, USPS or FedEx. The base plate was replaced. Selling an oem Holley list 4557 carburetor with...(May 17th, 2024)
• Holley 10741 Teapot 4000 4-barrel Carburetor 1074-1 Core 1955 Ford Thunderbird 292 V-8 (37.1% similar) Ford part number EYCK-9510-T. Holley teapot 4000 4-BARREL carburetor, list number 1074-1. Please verify part number and pictures match your application. Linkage moves free. See pics for condition. Carb core appears to be mostly complete. Core for rebuilding or parts...(May 17th, 2024)
• Holley 1920 Vintage Glass Bowl Carburetor Hot Rod Gasser Carb Core Rebuild (42.6% similar) Good condition all linkage moves as it should great for rebuild...(May 17th, 2024)
• Holley 80531 Front Primary Center Hung Fuel Bowl Cathedral Dp Double Pumper Vac Sec (31.7% similar) Shipping is expensive no matter who the carrier and please understand this. This will need a good cleaning before use. For your consideration today is a used Holley front primary hung fuel bowl cathedral DP double pumper vac sec. It includes everything that is in the pictures!, my...(May 17th, 2024)
• Holley 06425c Two Barrel 650cfm Carburetor 6425 Imca Cheater Outlaw Racing Core (40% similar) Rare Holley two barrel carburetor, list number 6425 - carb is together with choke removed but horn intact metering block also in very nice physical condition, all linkage moves freely kick down arm as well good overall core condition has been sitting fryers it should base and bores look...(May 17th, 2024)
• Holley Ecz-9510-m Teapot 4000 4-barrel Carburetor 1161-2 Carb 1956 Ford Thunderbird 312 V-8 (36% similar) Carb core appears to be mostly complete. Core for rebuilding or parts. Holley teapot 4000 4-BARREL carburetor, list number 1161-2. Please verify part number and pictures match your application. See pics for condition. Ford part number CZ-9510-M. Linkage moves free...(May 18th, 2024)
• Holley R3310-1 Carburetor List-3310-1 780cfm H4-4150 4bbl Carb Ford Chevy Bop Mopar (43.9% similar) Used Holley 780 cfm 4BBL carburetor. Being sold for parts, restoration, core, rebuild. Looks to be complete, no cracks, being sold as/is. LIST-3310-1, date, 0653...(May 18th, 2024)
• Holley 1850-3 Carburetor 4 Barrel 600 Cfm Vac Secondary Nice Rebuildable Core (45.6% similar) Many of the carbs have been rebuilt and were sitting in plastic bags, but I no history on what was done to them. It is missing a part of the electric choke. Very nice and clean vintage. Spectre fuel system accessory carburetor. The rest of it looks complete. 600 cfm vac...(May 19th, 2024)
• Holley 4360 Economaster 450 Cfm Carburetor 7454 Quadrajet Replacement Chevrolet (38.8% similar) List number is 7454. For sale is one 1 used Holley 4360 series 450 cfm spread bore carburetor. Verify it will fit your application prior to purchasing. Please look closely at all the pictures for condition and details. The carb is in poor shape and for parts only...(May 19th, 2024)
• Holley List-7001 4165 Spreadbore Carburetor 650cfm Core Or Parts (61.2% similar) This model is a spread bore design double pumper with two accelerator pumps. You are buying on a Holley model 4165 four-barrel carburetor, stamped p/n # LIST-7001, date code 1610, rated at 650 cfm ...(May 19th, 2024)
• Holley 4779 4150 4779 750cfm Competition Drag Racing Double Pumper Carburetor (41.8% similar) Holley 4150/4779/750C fm, competition drag racing double pumper carburetor. Is totally rebuilt, is in like new condition, and ready to install. This is an actual photo of the carb...(May 19th, 2024)