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Holley 0-76850HB 850CFM Ultra Double Pumper Carburetor

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#425076850HB

Holley 0-76850HB 850CFM Ultra Double Pumper Carburetor

Hard Core Gray™ w/ black anodized billet aluminum metering blocks/base plate. Casting is hard coat anodized for ultimate corrosion resistance
Ultra Double Pumpers feature an Optimized street/strip calibration that works out-of-the-box
Factory preset electric choke for easy startups

$967.95

/each

Factory Shipped

$1,075.95

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Product Summary

4-Barrel Carburetor Barrels, Gasoline Fuel Type

Hard Core Gray™ w/ black anodized billet aluminum metering blocks/base plate. Casting is hard coat anodized for ultimate corrosion resistance
Ultra Double Pumpers feature an Optimized street/strip calibration that works out-of-the-box
Factory preset electric choke for easy startups
Mechanical secondaries for awesome tire turning performance
4 corner idle allows you to precisely control your idle system

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Key Specs

Carburetor Barrels	4-Barrel
Fuel Type	Gasoline
Choke Type	Electric
CFM Range	800-899 CFM
CFM	850 CFM

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Holley 0-76850HB Details

ULTRA light

Aluminum construction for 43% weight savings

ULTRA stealthy

Hard Core Gray™ anodized finish

ULTRA strong

Billet metering blocks & base plates

ULTRA cool

Black anodized billet aluminum metering blocks and base plate

ULTRA easy

Built in sight window for simple float adjustments

ULTRA fast

High-performance fuel curves

The Ultra Double Pumper™ Carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061-T6 billet aluminum. They weigh in at approximately 5 lbs. less than a comparable zinc carburetor.

The new Ultra Double Pumper Carburetors have an enhanced fuel curve for optimum performance, with many more features such as aluminum construction, anodized billet aluminum metering blocks and base plate, 4 corner idle for precise idle control, mechanical secondaries for great performance, clear fuel level sight plugs for easy, no mess fuel level adjustments, Ford automatic transmission kickdown for use on popular Ford transmissions, four vacuum ports for all necessary vacuum accessories, and for the first time on a Double Pumper, factory pre-set electric choke for easy, fast cold start-ups.

The clean, stealthy look coupled with Black metering blocks and throttle body will certainly set your ride apart whether you are at the show or track.
Features:
Hard Core Gray™ w/ black anodized billet aluminum metering blocks/base plate. Casting is hard coat anodized for ultimate corrosion resistance
Ultra Double Pumpers feature an Optimized street/strip calibration that works out-of-the-box
Factory preset electric choke for easy startups
Mechanical secondaries for awesome tire turning performance
4 corner idle allows you to precisely control your idle system
Built in, clear fuel level sight glass for easy, no mess fuel level adjustments
Aluminum construction for a 43% weight savings
Compatible with GM, Chrysler, and Ford A/T kickdown linkage. Additional parts may be required.
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!

Specs

Barrel Quantity: 4
Barrels: 4
Billet Color: Black
Body Color: Hard Coat Gray
Body Finish: E-Coated
Body Material: Aluminum
Booster: Downleg
Booster Design: Downleg
Brand: Holley
Carburetor Material: Aluminum
Carburetor Use: Performance and Race
Category: Air and Fuel Delivery
CFM Rating: 850
Choke: Electric
Choke Type: Electric
Color: Hard Coat Gray
Condition: New
Cubic Feet Per Minute Rating: 850
Emission Code: 3
Finish: Hard Core Gray
Flange Shape: Square
Flange Type: Square/4150
Fuel: Gasoline
Fuel Inlet: Dual
Fuel Type: Gasoline
Grade Type: Performance
Linkage Attached: Yes
Marine Approved: No
Material: Aluminum
Model: 4150
Mounting Hole Quantity: 4
Part Type: Carburetor
Primary Jet Diameter: 80
Primary Main Jet Size: 80
Primary Power Valve: 6.5
Primary Pump Nozzle Size: 31
Product Type: Carburetor
Secondary Barrel Type: Mechanical
Secondary Main Jet Size: 80
Secondary Power Valve: 6.5
Secondary Pump Nozzle Size: 31
Spacer Included: No
Sub Category: Carburetion
Supercharger Compatible: No
Throttle Bore Diameter: 1.750 inch
Vacuum Ports: 1 timed (spark) port, 2 full, and 1 PCV port
Warning: California Proposition 65
Warranty: Manufacturer's Limited 90 Day Warranty

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Holley October Promo 10% Off Select Parts Sale

Holley's October Promo 10% Off Select Parts Sale, running from September 28, 2026, through November 1, 2026. For a limited time, customers can save up to 10% off on select Holley parts, making it the perfect opportunity to upgrade your ride with premium Holley branded parts including Holley, Brawler, Quick Fuel, Leg Wheels, Rev Wheels, Rocket Racing, Flowtech, Edge, Racequip, Apr and Dinan. Purchases must be made between September 28, 2026, through November 1, 2026. This limited-time offer applies to qualifying Holley branded parts purchased during the promotional period. Following the promotion, these parts will revert back to standard pricing.

Guides & Documents

Carburetors Installation Instructions (425076850HB)

CARB Warning

For use on pre-1966 vehicles only

Emissions warning: this part only legal for sale or use in California 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 Prop 65

CARB warning

Holley 0-76850HB Specifications

KEY SPECS
MFG. Part #	0-76850HB
Brand	Holley
Carburetor Barrels	4-Barrel
Fuel Type	Gasoline
Choke Type	Electric
CFM Range	800-899 CFM
CFM	850 CFM
Carburetor Flange Type	4-Barrel Square Bore
Finish	Hard Core Gray
Material Type	Aluminum
Color	Polished
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	Downleg
Throttle Bore	1.750 inch
Vacuum Ports	1 timed (spark) port, 2 full, and 1 PCV port
Primary Power Valve	6.5
Primary Pump Nozzle Size	31
Primary Jet Size	80
Secondary Jet Size	80
GTIN Code	090127718452
Sold in Quantity	Each

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