Our "615" Box Stock class carb. Airflow has been significantly increased by opening and reshaping the Venturi using a CNC machine - the same technology we use to bore our connecting rods. The carburetor will be jetted for your application. Will pass box stock tech. Jetting is for open air filter. Call if you are running a stock air box.
You will need to set your engine to idle at approximately 2000 RPM by adjusting the large phillips head plastic idle speed adjustment screw.
We jet these carbs specific to your application. Please select which restrictor plate you are using, which header configuration you are using, your type of racing and your cam from the drop-down boxes so we can customize your carb to match your needs.