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Overview
ULTRA light
Aluminum construction for 43% weight savings
ULTRA shiny
Tumble polished finish holds shine longer
ULTRA strong
Billet metering blocks & base plates
ULTRA cool
Blue anodized billet aluminum metering blocks and base plate
ULTRA easy
Built in sight window for simple float adjustments
ULTRA fast
High-performance fuel curves
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 Ultra Double Pumper™ Carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061-T6 billet aluminum. They weigh in at approximately 5 lbs. less than a comparable zinc carburetor.
The new Ultra Double Pumper Carburetors have an enhanced fuel curve for optimum performance, with many more features such as aluminum construction; anodized billet aluminum metering blocks and base plate; 4 corner idle for precise idle control; dual accelerator pumps for additional fuel under initial acceleration; mechanical secondaries for great performance; clear fuel level sight plugs for easy, no mess fuel level adjustments; Ford automatic transmission kickdown for use on popular Ford transmissions; four vacuum ports for all necessary vacuum accessories; and manual choke for easy, fast cold start-ups.
The clean, polished look coupled with Blue metering blocks and throttle body will certainly set your ride apart whether you are at the show or track.
Limited to Stock. Replaced by BR-67214
Features:
- Shiny with blue anodized billet aluminum metering blocks/base plate for good looks and true gasket sealing
- Ultra Double Pumpers feature an 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
- 4 corner idle allows you to precisely control your idle system
- Built in, clear fuel level sight glass for easy, no mess fuel level adjustments
- Aluminum construction for a 43% weight savings
- Compatible with GM, Chrysler, and Ford A/T kickdown linkage. Additional parts may be required.
- Intended for lightweight vehicles w/ manual trans or automatics with high stall & low gearing
- 100% wet-flow tested by Holley technicians to assure it arrives ready to run!
Specs
| Barrels | 4 |
|---|---|
| Billet Color | Blue |
| Booster | Down Leg |
| Brand | Holley |
| Carburetor Use | Performance and Race |
| CFM | 850 |
| Choke | Manual |
| Condition | New |
| Emission Code | 3 |
| Finish | Shiny |
| Fuel | Gasoline |
| Fuel Inlet | Dual |
| Marine Use | No |
| 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, 2 full, and 1 PCV port |
| Warranty | Limited 90 Day |
| Part Number | 0-76851BL |
Service Parts
![Renew Kit Carburetor Rebuild Kit]()
Renew Kit Carburetor Rebuild Kit Model Number 4150 600, 650, 700, 750, 800, 850 CFM.$44.66Qty:![Inlet Needle - Viton]()
Inlet Needle Viton® Tip Adjustable 0.110" Seat Size (Viton® is a registered trademark of DuPont Performance Elastomers)$17.69Qty:![Fuel Bowl Gasket]()
For Model 2300™, Model 4150™, Model 4160™ and Model 4500™ Two Circuit Carburetors$11.48Qty:![Metering Block Gasket]()
For Models 2300™, Model 4150™ Model 4160™ and Model 4500™ without Intermediate Circuit$11.48Qty:![Carburetor Standard Main Jet]()
![Carburetor Standard Main Jet]()
![Trick Kit Carburetor Rebuild Kit]()
Trick Kit Carburetor Rebuild Kit Holley Vac. Sec. & Double Pump$138.95Qty:![Replacement Fuel Bowl Kit]()
replacement secondary center hung Fuel Bowl Kit For Use w/Double Pump Carburetors excluding model 4165, standard finish.$61.42Qty:![Replacement Fuel Bowl Kit]()
Replacement primary center hung Fuel Bowl Kit For Use w/model 4160, 4150, and 2300 (0-4412) series carburetors with center hung bowls. Excluding model 4165. Standard finish$83.06Qty:![Throttle Body Kit, 0-4781]()
![Secondary Metering Block, 0-4781C]()
![Primary Metering Block, 0-4781C]()
Emissions
3
This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.
The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:
- 1965 and older U.S. manufactured California Certified vehicles
- 1967 and older U.S. manufactured Federally Certified vehicles
- 1967 and older Foreign manufactured vehicle
The following vehicles are considered Racing Use Only Vehicles:
- Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street
WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
The following vehicles are considered Emissions Controlled Vehicles:
- 1966 and newer U.S. manufactured California Certified vehicles
- 1968 and newer U.S. manufactured Federally Certified vehicles
- 1968 and newer Foreign manufactured vehicle
*Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.
Some parts are not legal for use in California or other states with similar regulations.
