Holley 850 Ultra Double Pumper with Red Billet

ULTRA light
Crafted from aluminum, this beauty offers a remarkable 43% weight reduction, making it a breeze to handle.

ULTRA shiny
The tumble polished finish ensures a lasting shine that will turn heads.

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

ULTRA cool
With its striking red anodized billet aluminum metering blocks and base plate, your engine will look as good as it performs.

ULTRA easy
The built-in sight window makes float adjustments a simple task.

ULTRA fast
Experience high-performance fuel curves that deliver when you need it most.

The Holley Double Pumper® carburetors are a fantastic choice for those looking to amp up their hot street cars or race machines. These carburetors have become an American classic, originally powering many of the legendary muscle cars and now helping countless vehicles cross the finish line. Whether you're hitting the streets or tearing up the quarter mile, the Double Pumper is your go-to option.

The Ultra Double Pumper™ Carburetors boast all-aluminum construction, featuring metering blocks and a base plate made from 6061-T6 billet aluminum. This design results in a weight savings of about 5 lbs compared to traditional zinc carburetors.

With enhanced fuel curves for peak performance, the new Ultra Double Pumper Carburetors come packed with features: aluminum construction, anodized billet aluminum metering blocks and base plate, 4 corner idle for precise control, dual accelerator pumps for that extra fuel on initial acceleration, mechanical secondaries for outstanding performance, clear fuel level sight plugs for easy adjustments, Ford automatic transmission kickdown compatibility, and for the first time ever on a Double Pumper, a factory preset electric choke for quick cold starts.

The clean, polished appearance combined with the vibrant red metering blocks and throttle body will definitely make your ride stand out at both shows and tracks.

Important Downloads:

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

Features:

• Eye-catching red anodized billet aluminum metering blocks and base plate for both style and effective sealing.
• Optimized street/strip calibration that works right out of the box.
• Factory preset electric choke for hassle-free startups.
• Mechanical secondaries for impressive performance.
• 4 corner idle allows for precise idle control.
• Built-in clear fuel level sight glass for easy, mess-free adjustments.
• Lightweight aluminum construction for significant weight savings.
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage (additional parts may be necessary).
• Designed for lightweight vehicles with manual transmissions or automatics featuring high stall and low gearing.
• Thoroughly wet-flow tested by Holley technicians to ensure it’s ready to run upon arrival!

Specifications:

• Barrels: 4
• Billet Color: Red
• 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 the Mr. Gasket #1932.