Holley MDL 4150 600 CFM D/P-CHROMATE Carburetor

If you're looking to amp up your hot street car or race vehicle, the Holley Double Pumper® carburetor is an outstanding choice. These carburetors are true American legends, having powered countless factory muscle cars and racing champions over the decades. Whether you're tearing up the streets or racing down the quarter mile, the Double Pumper is ready to deliver.

This carburetor is specifically designed for lightweight vehicles, whether you have 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 sleek tumble-polished look. With dual accelerator pumps, you’ll get that extra fuel boost right when you need it. Plus, mechanical secondaries ensure top-notch performance, while dual feed fuel inlets provide a steady flow of fuel to keep you moving. And let’s not forget the manual choke, which makes warming up your engine a breeze!

When it comes to performance, trust only the best. Holley has been a leader in modular carburetors for over a century, powering every NASCAR champion since the 1960s.

• Instructions for Part# 0-4776C
• Carburetor Numerical Listing for Part #0-4776C

• Gold Dichromate finish for corrosion resistance and classic Holley style
• 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
• Dual accelerator pumps to deliver extra fuel during initial acceleration
• Dual feed fuel inlets ensure constant high-volume fuel delivery
• Designed for lightweight vehicles with manual transmissions or automatics with high stall & low gearing
• 100% wet-flow tested by Holley technicians to guarantee it’s ready to run!

• Barrels: 4
• Billet Color: None
• Booster: Straight
• CFM: 600
• Choke: Manual
• Emission Code: 3
• Finish: Gold Dichromate
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Zinc
• Model: 4150
• Primary Main Jet: 66
• 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: 31
• Supercharged Application: No
• Throttle Bore: 1.563 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, making it compatible with Holley, Edelbrock, Carter AFB, and Autolite style carburetors that have a 5 3/16" x 5 5/8" bolt pattern. If you have a spreadbore style intake manifold, an adapter will be necessary for installation, similar to the Mr. Gasket #1932.