Holley 4150 850CFM Universal Double Pumper Carburetor

If you're looking to take your hot street car or race vehicle to the next level, the Holley Double Pumper® carburetor is just what you need. This carburetor isn't just a piece of performance equipment; it's an American classic that has been a staple in the world of performance carburetors. From its early days as the go-to choice for many iconic muscle cars to its role in helping countless racers cross the finish line, the Double Pumper is a fantastic option whether you're tearing up the streets or hitting the quarter mile.

The Double Pumper is specifically designed for lightweight vehicles, whether you have a manual transmission or an automatic with high stall and low rear-end gears. You can choose between a stunning gold dichromate finish or a sleek, polished shiny look. With its dual accelerator pumps, it provides extra fuel right when you need it, while the mechanical secondaries ensure impressive performance. Plus, the dual feed fuel inlets guarantee a steady flow of fuel, and the manual choke makes warming up your engine a breeze.

When it comes to performance, trust the experts. Holley has been a leader in the modular carburetor industry for over a century and has powered every NASCAR champion since the 1960s.

Important Downloads:

• Instructions for Part# 0-4781S
• Carburetor Numerical Listing for Part #0-4781S

Features:

• Beautiful shiny finish that looks great under the hood
• 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 outstanding performance that can turn tires
• Four-corner idle allows for precise control of your idle system
• Dual accelerator pumps provide extra fuel at the start
• Dual feed fuel inlets ensure a constant 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, ensuring it's ready to run right out of the box!

Specifications:

• Barrels: 4
• Booster: Down Leg
• CFM: 850
• Choke: Manual
• Emission Code: 3
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Aluminum
• Model: 4150
• Primary Main Jet: 80
• 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: 31
• Supercharged Application: No
• Throttle Bore: 1.750 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, an adapter will be required for installation, similar to the Mr. Gasket #1932.