Holley Model 4150 650 CFM Carburetor

If you're looking to amp up your hot street car or race vehicle, the Holley Double Pumper® carburetor is an excellent choice! This carburetor is truly an American classic, known for its performance prowess. From its early days as a favorite among muscle cars to its role in helping countless racers cross the finish line, the Double Pumper is a reliable companion whether you're tearing up the streets or hitting the quarter mile.

Designed specifically for lightweight vehicles, the Double Pumper works wonders with both manual transmissions and automatic transmissions that feature a high stall and low rear-end gears. You can choose between a stunning gold dichromate or a polished shiny finish. It comes equipped with dual accelerator pumps to provide extra fuel during those initial bursts of acceleration. With mechanical secondaries, you'll enjoy impressive performance, while dual feed fuel inlets ensure a steady high-volume fuel supply. Plus, the manual choke makes warming up your engine a breeze!

When it comes to performance, you want to trust a name with a legacy. Holley has been a leader in the carburetor industry for over a century, powering every NASCAR champion since the 1960s.

Important Downloads:

• Instructions for Part# 0-4777S
• Carburetor Numerical Listing for Part #0-4777S

Features:

• Striking shiny finish for an eye-catching look
• Optimized street/strip calibration that’s ready to roll right out of the box
• Manual choke (cable-driven, hand-operated) for accurate cold start control
• Mechanical secondaries for impressive tire-spinning power
• Dual accelerator pumps for that extra fuel when you need it
• Dual feed fuel inlets for consistent high-volume fuel delivery
• Perfectly suited for lightweight vehicles with manual transmissions or automatics with high stall and low gearing
• 100% wet-flow tested by Holley technicians to ensure it’s ready to perform!

Specifications:

• Barrels: 4
• Booster: Straight
• CFM: 650
• Choke: Manual
• Emission Code: 3
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Aluminum
• 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. It can replace Holley, Edelbrock, Carter AFB, and Autolite style carburetors with a bolt pattern of 5 3/16" x 5 5/8". If you're using a spreadbore style intake manifold, an adapter will be necessary for installation, similar to the Mr. Gasket #1932.