Holley 650 Ultra Double Pumper with Black Billet

ULTRA Light
Crafted from aluminum, this carburetor offers an impressive 43% weight reduction, making it easy on your engine.

ULTRA Shiny
With a tumble polished finish, it maintains its shine longer than ever, ensuring your engine looks as good as it performs.

ULTRA Strong
Featuring billet metering blocks and base plates, you can trust in its durability and performance.

ULTRA Cool
The black anodized billet aluminum metering blocks and base plate not only look sharp but also provide excellent functionality.

ULTRA Easy
Thanks to the built-in sight window, float adjustments are a breeze—no fuss, just performance.

ULTRA Fast
Designed with high-performance fuel curves, this carburetor is ready to deliver when you need it most.

Holley Double Pumper® carburetors are the go-to upgrade for hot street cars and race machines alike. These carburetors have become an American classic, powering everything from legendary muscle cars to modern high-performance vehicles. Whether you’re tearing up the streets or racing down the quarter mile, the Double Pumper is your trusted partner.

The Ultra Double Pumper™ Carburetors are made entirely of aluminum and come with metering blocks and a base plate crafted from 6061-T6 billet aluminum. They weigh about 5 lbs less than comparable zinc carburetors, giving you a significant advantage.

With an optimized fuel curve for peak performance, the new Ultra Double Pumper Carburetors come packed with features. Enjoy 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 need it, mechanical secondaries for outstanding performance, and clear fuel level sight plugs for easy adjustments without the mess. Plus, there's a Ford automatic transmission kickdown for popular Ford setups and four vacuum ports for all your accessory needs. For the first time on a Double Pumper, you’ll also find a factory pre-set electric choke that makes cold starts quick and hassle-free.

The sleek, polished appearance combined with the black metering blocks and throttle body will definitely make your ride stand out, whether you’re at a car show or on the track.

Important Downloads:

• Instructions for Part# 0-76650BK
• Carburetor Numerical Listing for Part #0-76650BK

Features:

• Striking black 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 effortless startups.
• Mechanical secondaries for impressive tire-turning power.
• Four-corner idle for precise idle system control.
• Integrated clear fuel level sight glass for easy, mess-free fuel level adjustments.
• Lightweight aluminum construction providing 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 with high stall and low gearing.
• 100% wet-flow tested by Holley technicians to ensure it’s ready to run right out of the box!

Specifications:

• Barrels: 4
• Billet Color: Black
• Booster: Straight
• CFM: 650
• Choke: Electric
• Emission Code: 3
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Aluminum
• Model: 4150
• Primary Main Jet: 63
• Primary Power Valve: 6.5
• Primary Pump Nozzle Size: 28
• Product Type: 4150 Model Carburetor
• Secondaries: Mechanical
• Secondary Main Jet: 73
• Secondary Pump Nozzle Size: 31
• Supercharged Application: No
• Throttle Bore: 1.688 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 have a spreadbore style intake manifold, an adapter will be necessary for installation, similar to the Mr. Gasket #1932.