Holley has taken their two most beloved double pumper sizes and made them even better with the addition of electric chokes. Now available in both the 650 and 750 CFM models, you can choose between a classic zinc finish or a sleek polished look.

Holley Double Pumper® carburetors are the go-to choice for anyone looking to amp up their hot street cars or race vehicles. These carburetors have become a staple in the performance world, earning their place as an American classic. From powering iconic muscle cars to helping countless racers cross the finish line, the Double Pumper is perfect whether you’re tearing up the streets or racing down the quarter mile. Designed specifically for lightweight vehicles, it works seamlessly with manual transmissions or automatic ones that have a high stall and low rear-end gears.

The Double Pumper is available in a stunning gold dichromate or a polished shiny finish. It features dual accelerator pumps that deliver extra fuel for that initial burst of speed, mechanical secondaries for impressive performance, and dual feed fuel inlets ensuring a steady, high-volume fuel supply. With its electric choke, controlling engine warm-up has never been easier. When it comes to performance, trust only the best—Holley has been a leader in the modular carburetor industry for over a century, powering every NASCAR champion since the 1960s.

Important Downloads:

• Instructions for Part# 0-4777CE

Features:

• Classic Zinc finish for corrosion resistance and that iconic Holley look
• Optimized street/strip calibration ready to go right out of the box
• Electric choke for easy and accurate cold start control
• Mechanical secondaries for incredible tire-spinning performance
• Dual accelerator pumps for that extra fuel when you need it
• Dual feed fuel inlets for a constant high-volume fuel supply
• Designed for lightweight vehicles with manual transmissions or automatics with high stall and low gearing
• Every unit is 100% wet-flow tested by Holley technicians to ensure it’s ready to run!

Specifications:

• Barrels: 4
• Booster: Straight
• CFM: 650
• Choke: Electric
• Emission Code: 3
• Finish: Gold Dichromate
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Zinc
• Model: 4150
• Primary Main Jet: 67
• 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: 28
• Supercharged Application: No
• Throttle Bore: 1.688 inch
• Vacuum Ports: 1 timed (spark) port, 1 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, you will need an adapter to install this carburetor, similar to the Mr. Gasket #1932.