Holley 650 Ultra Double Pumper with Blue Billet

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

ULTRA shiny
The tumble polished finish ensures that it retains its shine for a longer time, turning heads wherever you go.

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 add a touch of style to your engine bay.

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

ULTRA fast
Enjoy high-performance fuel curves that will keep your engine running at its best.

The Holley Double Pumper® carburetors are an outstanding choice for those looking to boost their hot street cars and race machines. With a legacy that dates back to being the go-to carburetor for many classic muscle cars, the Double Pumper has powered countless vehicles across the finish line. Whether you’re tearing up the streets or racing down the quarter mile, this carburetor is a fantastic option.

The Ultra Double Pumper™ Carburetors are designed with all-aluminum construction, featuring metering blocks and a base plate crafted from 6061 T6 billet aluminum. They weigh about 5 lbs. less than comparable zinc carburetors, making them a lighter choice for performance enthusiasts.

The latest Ultra Double Pumper Carburetors come with an improved fuel curve for optimal performance. They also boast a range of impressive features including anodized billet aluminum metering blocks and base plate, a 4-corner idle system for precise control, dual accelerator pumps for an extra boost during initial acceleration, and mechanical secondaries for top-notch performance. Plus, clear fuel level sight plugs make adjustments mess-free, and the Ford automatic transmission kickdown is compatible with popular Ford transmissions. For the first time on a Double Pumper, you’ll also find a factory pre-set electric choke for quick and easy cold starts.

The clean, polished appearance, complemented by the blue metering blocks and throttle body, will certainly make your ride stand out, whether at a car show or on the track.

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

• Striking blue anodized billet aluminum metering blocks and base plate for great looks and reliable sealing.
• Optimized street/strip calibration that works right out of the box.
• Factory preset electric choke for effortless startups.
• Mechanical secondaries for impressive performance.
• 4-corner idle for precise idle system control.
• Built-in clear fuel level sight glass for easy fuel level adjustments without the mess.
• Lightweight aluminum construction for significant weight savings.
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage (additional parts may be needed).
• 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!

• Barrels: 4
• Billet Color: Blue
• 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 inches
• Vacuum Ports: 1 timed (spark) port, 2 full, and 1 PCV port
• Warranty: Limited 90 Day

• 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.