Converts your 650 ,700, 750 CFM Holley Double Pumper into a high-performance HP main body with dropleg boosters
Eliminates choke tower to reduce turbulence and boost airflow
Factory-assembled with gaskets and main jets included for simple installation
Upgrade your street or strip Holley Double Pumper to full HP specification with this 650/ 700/ 750 CFM aluminium main body retrofit kit featuring dropleg boosters. Designed to fit 0-4777, 0-4778, 0-4779C, 0-4779S, 0-4779SA, and 0-76751 models, this kit delivers more torque, horsepower, and smoother airflow by removing the choke tower and air horn. Installation is straightforward using basic tools, and the pre-calibrated setup ensures instant gains in drivability and throttle response.
Holley 750 CFM HP Main Body is a great upgrade from standard flow main body. This main body will work in place of any 650-800 CFM mechanical secondary carburetor. It comes with .160 Step boosters which help with flow and throttle response. The main body will come as pictured with high flow nozzle screws and #35 pump nozzles. The air bleeds are #73 for the Idle air and #31 for the high speed. Both Nozzles and Air Bleeds are available to purchase for tuning.
