The Edelbrock Performer Carburetor features two-piece aluminum construction for cooler operating temperatures and less warping. There are no gaskets below the fuel bowl level for fewer leaks and no plastic parts or power valves to blow out. It uses easily changed metering rods for precise tuning and the primary venture booster is a bottom-feed design for smoother acceleration and better drivability. It controls the float level, atomizes the fuel into a useable air / fuel mixture in the proper proportions and transition between circuits.