Holley 4150 Series Classic Double Pumper 4 Bbl Carburetor; Mechanical Secondary; Manual Choke; 750 CFM; Polished

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.

• Tumble polished 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 with manual trans or automatics with high stall and low gearing
• 100% wet-flow tested by Holley technicians to assure it arrives ready to run

• Booster: Straight
• CFM: 750
• Choke: Manual
• Finish: Polished
• Fuel: Gasoline
• Fuel Inlet: Dual
• Material: Zinc
• Model: 4150
• Primary Main Jet: 70
• Primary Power Valve: 6.5
• Primary Pump Nozzle Size: 28
• Secondaries: Mechanical
• Secondary Main Jet: 80
• Secondary Pump Nozzle Size: 31
• Throttle Bore: 1.688"
• Vacuum Ports: 1 timed (spark) port, 1 full, and 1 PCV port

Important: Not for use on pollution controlled vehicles. See Emission Notes below.

Note: Pictured for illustration purposes only.

For (PPCV) Pre-Pollution Controlled Vehicles Only: Legal for use on all vehicles that were manufactured before emissions control regulations were imposed. Check your state law before ordering.

For Racing Use Only: This product is intended for vehicles that are exclusively designated as a racing or off-road vehicle only. This product is not legal for use on vehicles that are operated on public highways. Not for use on a street-driven vehicle.

• 1965 and Older, USA Manufactured, California Certified Vehicles
• 1967 and Older, USA Manufactured, Federally Certified Vehicles