This retrofit main body kit converts 0–4777 (650 CFM) and 0–4779 (750 CFM) Carburetors to a 750 CFM HP main body for increased horsepower, torque & airflow.
HP Main Body Retro Fit Kit For Holley Double Pumper® Carb Part Numbers 0–4777 & 0–4779 – Shiny Finish
Features
Eliminates Choke Tower and Associated Hardware of Standard Holley Double Pumper®
Reduces Turbulence And Smoothes Air Entry Into The Venturi
Pre-Calibrated At The Factory For Optimum Performance and Drivability on a Wide Variety of Applications