Double Pumper Carburetor 850 CFM 4150 Mechanical Secondaries Shiny Gasoline - Holley - 0-4781S

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.

Features and Benefits:


Shiny finish for good looks Optimized street/strip calibration that works out-of-the-box Manual choke (Cable driven, hand operated) for precise cold start control Mechanical secondaries for awesome tire turning performance 4 corner idle allows you to precisely control your idle system Dual accelerator pumps for additional fuel under initial acceleration Dual feed fuel inlets for constant high volume fuel delivery Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing 100 percent wet-flow tested by Holley technicians to assure it arrives ready to run!


Associated Comments:


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 inch x 5 5/8 inch 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.


Details:


Barrel Quantity: 4.0

Body Color: Polished

Body Finish: Polished

Booster: Downleg

Booster Design: Downleg

CFM: 850.0

Carburetor Material: Aluminum

Carburetor Use: Performance and Race

Choke Type: Manual

Condition: New

Cubic Feet Per Minute Rating: 850.0

Finish: Shiny

Flange Type: Square/4150

Fuel Type: Gasoline

Fuel Inlet: Dual

Grade Type: Performance

Linkage Attached: Yes

Marine Approved: No

Marine Use: No

Material: Aluminum

Model: 4150

Mounting Hole Quantity: 4.0

Primary Jet Diameter: 80.0

Primary Main Jet: 80.0

Primary Power Valve: 6.5

Primary Pump Nozzle Size: 31.0

Secondaries: Mechanical

Secondary Main Jet: 80.0

Secondary Pump Nozzle Size: 31.0

Spacer Included: No

Supercharged Application: No

Throttle Bore: 1.750 inch

Vacuum Ports: 1 timed (spark) port, 1 full, and 1 Pcv port

Warranty: Manufacturer's Limited 90 Day Warranty