Holley 850 Ultra Double Pumper - Hard Core Gray

ULTRA light
Crafted from aluminum, this carburetor offers a remarkable 43% weight reduction.

ULTRA stealthy
Featuring a Hard Core Gray™ anodized finish that looks sharp and sophisticated.

ULTRA strong
Constructed with billet metering blocks and base plates for unmatched durability.

ULTRA cool
The black anodized billet aluminum metering blocks and base plate add a sleek touch.

ULTRA easy
Enjoy a built-in sight window for effortless float adjustments.

ULTRA fast
Designed with high-performance fuel curves to keep you moving.

The Ultra Double Pumper™ Carburetors are all about performance and efficiency. Made entirely from aluminum, they come with metering blocks and a base plate crafted from 6061-T6 billet aluminum, making them approximately 5 lbs lighter than standard zinc carburetors.

With the latest Ultra Double Pumper Carburetors, you’ll experience an optimized fuel curve for top-notch performance. They come packed with features like anodized billet aluminum metering blocks and base plates, four corner idle for precise control, and mechanical secondaries that ensure a powerful drive. Plus, you’ll appreciate the clear fuel level sight plugs for easy adjustments, Ford automatic transmission kickdown compatibility, and four vacuum ports for all your accessory needs. For the first time, we’ve included a factory pre-set electric choke, making cold starts a breeze!

The sleek, stealthy design, complemented by black metering blocks and throttle body, is sure to turn heads whether you’re at a car show or tearing up the track.

• Instructions for Part# 0-76850HB
• Carburetor Numerical Listing for Part# 0-76850HB

• Hard Core Gray™ finish with black anodized billet aluminum metering blocks and base plate. The casting is hard coat anodized for ultimate corrosion resistance.
• The Ultra Double Pumpers come with an optimized street/strip calibration that’s ready to go right out of the box.
• Factory preset electric choke for easy startups.
• Mechanical secondaries deliver impressive performance.
• Four corner idle allows for precise idle system control.
• Built-in clear fuel level sight glass makes fuel level adjustments a breeze.
• Lightweight aluminum construction contributes to a 43% weight savings.
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage. Additional parts may be required.
• Designed for lightweight vehicles with manual transmissions or automatics featuring high stall and low gearing.
• 100% wet-flow tested by Holley technicians to ensure it’s ready to run right out of the box!

• Barrels: 4
• Billet Color: Black
• Booster: Down Leg
• CFM: 850
• Choke: Electric
• Emission Code: 3
• Finish: Hard Core Gray
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Aluminum
• Model: 4150
• Primary Main Jet: 80
• Primary Power Valve: 6.5
• Primary Pump Nozzle Size: 31
• Product Type: 4150 Model Carburetor
• Secondaries: Mechanical
• Secondary Main Jet: 80
• Secondary Pump Nozzle Size: 31
• Supercharged Application: No
• Throttle Bore: 1.750 inch
• Vacuum Ports: 1 timed (spark) port, 2 full, and 1 PCV port
• Warranty: Limited 90 Day

• This model features a square bore flange bolt pattern and can replace Holley, Edelbrock, Carter AFB, and Autolite style carburetors with a 5 3/16" x 5 5/8" bolt pattern. If your intake manifold is of the spreadbore style, you’ll need an adapter to install this carburetor, similar to the Mr. Gasket #1932.