Holley 0-4777S 650 CFM Double Pumper Carburetor

#42504777S

Holley 0-4777S 650 CFM Double Pumper Carburetor

Name: Holley 0-4777S 650 CFM Double Pumper Carburetor
Brand: Holley
SKU: 42504777S
Price: 699.95 USD
Availability: InStock
Rating: 5 (3 reviews)

3 Reviews

Ask a Question

Features an optimized street/strip calibration that works out-of-the-box
Has a manual choke (Cable driven, hand operated) for precise cold start control
Includes mechanical secondaries for awesome tire turning performance

$699.95

/each

In Stock

Quantity

Need Help? Call to Order

Add to a list

Select a vehicle to verify Fitment

Select Vehicle

Product Summary

Universal Fit, 4-Barrel Carburetor Barrels, 650 CFM CFM

Features an optimized street/strip calibration that works out-of-the-box
Has a manual choke (Cable driven, hand operated) for precise cold start control
Includes mechanical secondaries for awesome tire turning performance
Comes with dual accelerator pumps for additional fuel under initial acceleration
It is intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing

See more details

Key Specs

Carburetor Barrels	4-Barrel
Fuel Type	Gasoline
Choke Type	Manual
CFM Range	600-699 CFM
CFM	650 CFM

See more specs

Need To Know

Need help?

855.313.9176

View the Help Center

Quick and Easy Returns

Return Policy

Holley 0-4777S Details

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.

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
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% wet-flow tested by Holley technicians to assure it arrives ready to run!

Charts

Installation Instructions (PDF)

Guides & Documents

Carburetors Installation Instructions (42504777S)

Determining the Best Performance Carburetor For Your Application

Carburetors Installation Instructions (42504777S)

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

Holley 0-4777S Specifications

KEY SPECS
MFG. Part #	0-4777S
Brand	Holley
Carburetor Barrels	4-Barrel
Fuel Type	Gasoline
Choke Type	Manual
CFM Range	600-699 CFM
CFM	650 CFM
Carburetor Flange Type	4-Barrel Square Bore
Finish	Shiny
Material Type	Aluminum
Color	Silver
Secondary Type	Mechanical
Fuel Inlet Type	Dual
Gasket(s) Included	Yes
New or Remanufactured	New
Throttle Linkage Type	Universal
Supercharged Application	No

GENERAL
Model	4150
Booster	straight
Emission Code	3
Throttle Bore	1.688 inch
Vacuum Ports	1 timed (spark) port, 1 full, and 1 PCV port
Bolt Hole Pattern	5.160" x 5.625"
GTIN Code	090127427392
Sold in Quantity	Each

Ratings & Reviews

3 Reviews

Overall Assessment

Customers highly appreciate the product for its perfect fit and immediate functionality. They are impressed with its substantial effect on their vehicles' performance, including the GT-350 Shelby which runs great with our product installed. A standout feature is its ability to enhance the car's running condition, outperforming competitors. Hence, customers express their willingness to repurchase, indicating satisfaction and essential reliability.

Write A Review

3 reviews

Filter by Ratings

Sort Reviews

Great carb

5.0

a month ago

Tommy

New mexico

Verified

Great carb worked well on my 355.

Would Recommend

Yes I would buy another - perfect fit and was pre set to run

5.0

2 months ago

Rich

Windsor, Co

Verified

Put it on my GT-350 Shelby, started right up and runs great!

Would Recommend

just what i needed

5.0

9 years ago

ace

wichita ks

Verified

my car is running better than ever

Would Recommend

Showing 3 of 3 reviews

Questions & Answers

Be the first to ask a question.