JET PERFORMANCE HP SERIES HOLLEY STAGE 4 CARBURETOR -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; 1000 CFM, Venturi Size Is Increased By .030 And Throttle Shafts Are Trimmed And Radiused For Ultimate Airflow, Metering Block Is Fully Blueprinted, Balancing Main Well Volume, Optimizing The Emulsion System, Idle Circuit Calibration, Power Valve Circuit Sizing And High Speed Calibration To Precisely Match Specifications Of Motor, It Deliver The Ultimate Fuel Curve And Fuel Atomization For Maximum Horsepower And Torque Condition: New Emissions: 49-State Legal - no CA shipments Product Fit: Minor Modifications Quantity Sold: Sold Individually Anticipated Ship Out Time: 2-3 business days Fuel Type: Gasoline Part Number: 1000S4