Holley 4150 750CFM Double Pumper Super Carburetor - Polished Finish

If you're looking to take your hot street car or race machine to the next level, the Holley Double Pumper® carburetor is just what you need. This carburetor has become an American classic, powering everything from factory muscle cars to countless race vehicles that have crossed the finish line. Whether you're burning rubber on the street or racing down the quarter mile, this Double Pumper is a fantastic choice.

Designed specifically for lightweight vehicles, this carburetor shines on those with a manual transmission or an automatic setup featuring a high stall and low rear end gears. The Supercharger Double Pumper boasts a stunning tumble-polished finish and is equipped with dual accelerator pumps to deliver extra fuel during those critical moments of initial acceleration. Its mechanical secondaries ensure impressive performance, while the dual feed fuel inlets guarantee a steady high volume of fuel delivery. Plus, the manual choke offers easy control for warming up your engine.

This carburetor is tailored for supercharged applications and comes with a special feature: its power valves reference the intake manifold vacuum located below the supercharger. This unique design allows the power valve to function correctly based on the intake manifold vacuum, providing additional enrichment to the main metering system during low vacuum conditions. Without this external referencing, the power valve would misread the supercharger vacuum, which doesn’t accurately reflect engine load.

• Notice for Part# 0-80573S
• Instructions for Part# 0-80573S
• Carburetor Numerical Listing for Part #0-80573S

• Stunning tumble-polished finish for a sleek look
• Small block Chevrolet 1x4, 170 series blower calibration
• Manual choke for precise control during cold starts
• Dual accelerator pumps to provide that extra fuel when you need it
• Dual feed fuel inlets ensure a constant high volume of fuel delivery
• Mechanical secondaries for perfect launches off the line
• 4 corner idle system allows for precise idle adjustments
• Ideal for lightweight vehicles with manual transmissions or automatics with high stall and low gearing
• Boost-referenced power valve for optimal performance under acceleration
• 100% wet-flow tested by Holley technicians to ensure it's ready to run right out of the box!

• Barrels: 4
• Booster: Down Leg
• CFM: 750
• Choke: Manual
• Emission Code: 3
• Finish: Polished
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Zinc
• Model: 4150
• Primary Main Jet: 74
• Primary Power Valve: 10.5
• Primary Pump Nozzle Size: 28
• Product Type: 4150 Model Carburetor
• Secondaries: Mechanical
• Secondary Main Jet: 84
• Secondary Pump Nozzle Size: 31
• Supercharged Application: Yes
• Throttle Bore: 1.688 inches
• Warranty: Limited 90-Day

• This carburetor features a square bore flange bolt pattern, allowing it to replace Holley, Edelbrock, Carter AFB, and Autolite style carburetors with a 5 3/16" x 5 5/8" bolt pattern. If your intake manifold is spreadbore style, you will need an adapter, like the Mr. Gasket #1932, to install this carburetor.