Holley 850 Ultra Double Pumper with Blue Billet

ULTRA Light
Crafted from aluminum, this carburetor boasts a remarkable 43% weight reduction, making it a breeze to handle.

ULTRA Shiny
Thanks to its tumble-polished finish, it maintains its brilliant shine longer than ever.

ULTRA Strong
Featuring billet metering blocks and base plates, this carburetor is built to last.

ULTRA Cool
The striking blue anodized billet aluminum metering blocks and base plate really make a statement under the hood.

ULTRA Easy
With a built-in sight window, adjusting the float has never been simpler.

ULTRA Fast
Designed with high-performance fuel curves, this carburetor ensures you get the power you need right when you need it.

The Holley Double Pumper® carburetors are a fantastic upgrade for hot street cars and race vehicles alike. These iconic carburetors have a rich history, powering countless factory muscle cars and helping drivers cross the finish line in style. Whether you're hitting the streets or tearing up the quarter mile, the Double Pumper is a stellar choice.

The Ultra Double Pumper™ Carburetors are made entirely of aluminum and incorporate metering blocks and a base plate crafted from 6061-T6 billet aluminum, weighing in at about 5 lbs. lighter than comparable zinc carburetors.

With an optimized fuel curve for peak performance, the new Ultra Double Pumper Carburetors come packed with features: aluminum construction, anodized billet aluminum metering blocks and base plate, four corner idle for precise control, dual accelerator pumps for that extra fuel when you hit the gas, mechanical secondaries for impressive performance, clear fuel level sight plugs for mess-free adjustments, Ford automatic transmission kickdown compatibility, and for the first time ever on a Double Pumper, a factory preset electric choke for easy cold starts.

The polished finish, combined with the eye-catching blue metering blocks and throttle body, will undoubtedly make your ride stand out, whether you're at a car show or on the track.

Important Downloads:

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

Features:

• Stunning blue anodized billet aluminum metering blocks and base plate ensure both style and a reliable seal.
• Optimized street/strip calibration for out-of-the-box performance.
• Factory preset electric choke for hassle-free starts.
• Mechanical secondaries deliver fantastic acceleration.
• Four corner idle allows for precise idle adjustments.
• Built-in, clear fuel level sight glass for easy fuel level checks without the mess.
• Aluminum construction results in a significant weight saving of 43%.
• 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.
• Each unit is 100% wet-flow tested by Holley technicians, ensuring it's ready to run right out of the box!

Specifications:

• Barrels: 4
• Billet Color: Blue
• Booster: Down Leg
• CFM: 850
• Choke: Electric
• Emission Code: 3
• Finish: Shiny
• 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

Notes:

• This carburetor 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 you're using a spreadbore style intake manifold, an adapter will be necessary for installation, similar to Mr. Gasket #1932.