HOLLEY 750 CFM DOUBLE PUMPER CARB,SHINY ALUMINUM,4150,ELECTRIC CHOKE HOLLEY 4150 750 CFM DOUBLE PUMPER CARBURETOR LIST 4779 2 eBay Holley Manual Choke 4150 Mechanical Secondaries 600 CFM Double Pumper Holley 4150 650 CFM Double Pumper Dual Feed Carburetor List 4777 2 HOLLEY CLASSIC HP CARBURETOR,650 CFM,MECHANICAL SECONDARIES,GOLD,4150. Holley Double Pumper carburetors are a perfect performance upgrade for hot street cars and race vehicles. Double Pumper carburetors are an American icon when it comes to performance carburetors. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice whether you are burning up the street or the quarter mile. The Double Pumper is designed for use on lightweight vehicles with a manual transmission or an automatic transmission with a high stall and low rear end gears. The Double Pumper is available in a gold dichromate or tumble polished shiny finish and features dual accelerator pumps for additional fuel under initial acceleration, mechanical secondaries for great performance, dual feed fuel inlets for constant high volume fuel delivery and a manual choke for easy control of engine warm up. Don't trust your performance to just anyone, Holley is the only modular carburetor company that has been in business for over 100 years and has powered every Nascar champion since the 60's. Features and Benefits: Shiny finish for good looks Optimized street strip calibration that works out of the box Manual choke (Cable driven, hand operated) for precise cold start control Mechanical secondaries for awesome tire turning performance Dual accelerator pumps for additional fuel under initial acceleration Dual feed fuel inlets for constant high volume fuel delivery Intended for lightweight vehicles w manual trans or automatics with high stall & low gearing 100 percent wet flow tested by Holley technicians to assure it arrives ready to run! Associated Comments: This model of carburetor has the square bore flange bolt pattern. It can replace Holley, Edelbrock, Carter Afb, and Autolite style carburetors with 5 3 16 inch x 5 5 8 inch 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. Details: Barrel Quantity: 4. 0 Body Color: Polished Body Finish: Polished Booster: Straight Booster Design: Straight CFM: 650. 0 Carburetor Material: Aluminum Carburetor Use: Performance and Race Choke Type: Manual Condition: New Cubic Feet Per Minute Rating: 650. 0 Finish: Shiny Flange Type: Square 4150 Fuel Type: Gasoline Fuel Inlet: Dual Grade Type: Performance Linkage Attached: Yes Marine Approved: No Marine Use: No Material: Aluminum Model: 4150 Mounting Hole Quantity: 4. 0 Primary Jet Diameter: 67. 0 Primary Main Jet: 67. 0 Primary Power Valve: 6. 5 Primary Pump Nozzle Size: 28. 0 Secondaries: Mechanical Secondary Main Jet: 73. 0 Secondary Pump Nozzle Size: 28. 0 Spacer Included: No Supercharged Application: No Throttle Bore: 1. 688 inch Vacuum Ports: 1 timed (spark) port, 1 full, and 1 Pcv port Warranty: Manufacturer's Limited 90 Day Warranty