These aluminum main body retrofit kits convert your Holley 650-750 CFM Carb Mechanical Secondary to an aluminum main body for increased horsepower, torque & airflow. With no air horn, choke tower, or choke control to restrict airflow, they deliver extra power easily and affordably.

Product Features:

• Main bodies are factory assembled and kit includes new gaskets to complete the conversion
• New main jets are included, however further tuning may be necessary depending on the application
• Simple installation with common hand tools
• Pre-calibrated at the factory for optimum performance and drivability on a wide variety of applications
• Reduces turbulence and smooths air entry into the venturi
• Eliminates choke tower on your existing carburetor if applicable.