Holley MODEL 4150 750CFM Carburetor

If you're looking to boost your ride's performance, the Holley Double Pumper® carburetor is a fantastic choice for both hot street cars and race machines. These carburetors have become a classic in the world of performance, having started as the go-to option for many iconic muscle cars and continuing to power countless vehicles across the finish line. Whether you're tearing up the streets or racing down the quarter mile, the Double Pumper is ready to deliver.

This model is specifically designed for lightweight vehicles, whether you’re running a manual transmission or an automatic with a high stall and low rear-end gears. You can choose between a stunning gold dichromate finish or a polished shiny look. With dual accelerator pumps, you’ll get that extra fuel right when you need it, while mechanical secondaries ensure top-notch performance. Plus, the dual feed fuel inlets guarantee a steady high-volume fuel delivery, and the manual choke makes warming up your engine a breeze.

When it comes to performance, you want to trust a name with a history. Holley has been the leading modular carburetor company for over a century and has powered every NASCAR champion since the 1960s.

• Instructions for Part# 0-4779S
• Carburetor Numerical Listing for Part #0-4779S

• Stunning shiny finish for a sleek look
• Optimized street/strip calibration that works right out of the box
• Manual choke (cable-driven, hand-operated) for precise cold start control
• Mechanical secondaries for impressive tire-spinning performance
• Four corner idle allows for precise idle system control
• Dual accelerator pumps for that extra fuel during initial acceleration
• Dual feed fuel inlets for consistent high-volume fuel delivery
• 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's ready to run!

• Barrels: 4
• Booster: Down Leg
• CFM: 750
• Choke: Manual
• Emission Code: 3
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Aluminum
• Model: 4150
• Primary Main Jet: 70
• Primary Power Valve: 6.5
• Primary Pump Nozzle Size: 28
• Product Type: 4150 Model Carburetor
• Secondaries: Mechanical
• Secondary Main Jet: 80
• Secondary Pump Nozzle Size: 31
• Supercharged Application: No
• Throttle Bore: 1.688 inch
• Vacuum Ports: 1 timed (spark) port, 1 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 have a spreadbore intake manifold, an adapter will be necessary for installation, such as the Mr. Gasket #1932.