Upgraded Iconic Performance Carburetor
Holley Ultra Double Pumper 750 CFM 4-barrel carburetors give you maximum performance in a good-looking, easy-to-install package. They're calibrated to give you excellent performance with additional fuel delivery from its additional accelerator pump. Ultra Double Pumper carbs feature durable billet aluminum metering blocks and baseplate. Electric choke allows simplified installation and trouble-free cold starting.

Maximum Tunability
Holley Ultra Double Pumper carbs are wet flow tested before leaving the factory. These 4150 series carburetors allow maximum tunability from their front and rear metering blocks and dual accelerator pumps. You can dial in maximum performance by changing jets and accelerator pump cams front and rear. This allows you to keep up with the fuel demands of high horsepower, hard-launching street/strip race cars. Built in window sight plugs allow easy float adjustments on the engine and 4-corner idle adjustment allows you to get your idle just right.

750 CFM Rating
Rated at 750 cubic feet per minute of airflow (CFM), this size carburetor is good for most street/strip engines making between 400 and 500 horsepower. Good examples would be a heavily modified 383 cubic inch engine that will be revved to 6500+ RPM or a moderately built 454 that will stay under 6000 RPM.