This model of carburetor has the square bore flange bolt pattern. It can replace Holley, Edelbrock, Carter AFB, and Autolite style carburetors with 5 3/16" x 5 5/8" bolt pattern. If you have a spreadbore style intake manifold, you will need an adapter to install this carburetor. Similar to the Mr. Gasket #1932.
Holley Double Pumper® carburetors are a perfect performance upgrade for hot street cars and race vehicles. Double Pumper carburetors are an American icon when it comes to performance carburetors. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice whether you are burning up the street or the quarter mile. The Double Pumper is designed for use on lightweight vehicles with a manual transmission or an automatic transmission with a high stall and low rear end gears. The Double Pumper is available in a gold dichromate or tumble polished shiny finish and features dual accelerator pumps for additional fuel under initial acceleration; mechanical secondaries for great performance; dual feed fuel inlets for constant high volume fuel delivery and a manual choke for easy control of engine warm up. Don't trust your performance to just anyone, Holley is the only modular carburetor company that has been in business for over 100 years and has powered every NASCAR champion since the 60's.
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Shiny finish for good looks
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Optimized street/strip calibration that works out-of-the-box
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Manual choke (Cable driven, hand operated) for precise cold start control
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Mechanical secondaries for awesome tire turning performance
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4 corner idle allows you to precisely control your idle system
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Dual accelerator pumps for additional fuel under initial acceleration
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Dual feed fuel inlets for constant high volume fuel delivery
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Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing
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100% wet-flow tested by Holley technicians to assure it arrives ready to run!
Barrel Quantity |
4 |
|---|---|
Barrels |
4 |
Body Color |
Polished |
Body Finish |
Polished |
Booster |
Downleg |
Booster Design |
Downleg |
Brand |
Holley |
Carburetor Material |
Aluminum |
Carburetor Use |
Performance and Race |
CFM |
850 |
Choke |
Manual |
Choke Type |
Manual |
Condition |
New |
Cubic Feet Per Minute Rating |
850 |
Emission Code |
3 |
Finish |
Shiny |
Flange Type |
Square/4150 |
Fuel |
Gasoline |
Fuel Inlet |
Dual |
Grade Type |
Performance |
Linkage Attached |
Yes |
Marine Approved |
No |
Marine Use |
No |
Material |
Aluminum |
Model |
4150 |
Mounting Hole Quantity |
4 |
Primary Jet Diameter |
80 |
Primary Main Jet |
80 |
Primary Power Valve |
6.5 |
Primary Pump Nozzle Size |
31 |
Product Type |
Carburetor |
Sale Category |
Carburetors and Components |
Secondaries |
Mechanical |
Secondary Main Jet |
80 |
Secondary Pump Nozzle Size |
31 |
Spacer Included |
No |
Supercharged Application |
No |
Throttle Bore |
1.750 inch |
Vacuum Ports |
1 timed (spark) port, 1 full, and 1 PCV port |
Warranty |
Limited 90 Day |
UPC |
090127427477 |
Part Number |
0-4781S |
ABOUT HOLLEY PERFORMANCE
For over a century Holley has driven the cutting edge of fuel-system design. That work continues today through Holley’s market-leading EFI products as well as through Holley’s family of best-in-industry brands. Top brands like MSD, Flowmaster, Hurst, Accel, and many more make up the industry’s leading offering of enthusiast-driven products to deliver robust, complete performance solutions for builders, racers, and drivers. From propelling the LS-, Coyote-, and Gen 3 Hemi-swap trends, to continuously innovating late-model and vintage vehicle performance, Holley’s commitment to its customers and their cars is at the core of everything we do.
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