Holley 750 Ultra Double Pumper with Blue Billet

ULTRA light
Constructed from aluminum, this beauty offers a remarkable 43% weight savings.

ULTRA shiny
The tumble polished finish not only looks fantastic but also keeps its shine for a longer time.

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

ULTRA cool
The blue anodized billet aluminum metering blocks and base plate add a stylish touch.

ULTRA easy
With a built-in sight window, adjusting the float is a breeze.

ULTRA fast
Designed for high-performance fuel curves, it’s ready to deliver.

Holley Double Pumper® carburetors are the go-to choice for those seeking a performance boost in hot street cars and race vehicles. These carburetors have become an American icon, known for their impressive capabilities. Whether you’re tearing up the streets or racing down the quarter mile, the Double Pumper is a fantastic option that has powered countless vehicles across the finish line.

The Ultra Double Pumper™ Carburetors are crafted entirely from aluminum and feature metering blocks and a base plate made from 6061-T6 billet aluminum, making them approximately 5 lbs lighter than comparable zinc carburetors.

This latest iteration of Ultra Double Pumper Carburetors comes with an optimized fuel curve for peak performance. It boasts a range of features, including aluminum construction, anodized billet aluminum metering blocks and base plate, a four-corner idle system for precise control, dual accelerator pumps for that extra kick during initial acceleration, and mechanical secondaries for exceptional performance. Plus, you’ll appreciate the clear fuel level sight plugs for easy, mess-free adjustments, Ford automatic transmission kickdown compatibility, and for the first time on a Double Pumper, a factory pre-set electric choke for quick, hassle-free cold starts.

The sleek, polished look paired with the blue metering blocks and throttle body will definitely make your ride stand out, whether you're at a car show or hitting the track.

• Instructions for Part# 0-76750BL
• Carburetor Numerical Listing for Part #0-76750BL

• Striking blue anodized billet aluminum metering blocks and base plate for both aesthetics and effective gasket sealing.
• Optimized street/strip calibration that works right out of the box.
• Factory preset electric choke for effortless starts.
• Mechanical secondaries deliver outstanding performance.
• Four corner idle system allows for precise idle adjustments.
• Clear fuel level sight glass for easy, no-mess fuel level checks.
• Aluminum construction provides a significant weight reduction.
• Compatible with GM, Chrysler, and Ford A/T kickdown linkage (some 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 arrives ready to run!

• Barrels: 4
• Billet Color: Blue
• Booster: Down Leg
• CFM: 750
• Choke: Electric
• Emission Code: 3
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Aluminum
• Model: 4150
• Primary Main Jet: 72
• 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: 28
• Supercharged Application: No
• Throttle Bore: 1.688 inch
• 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.