Many will tell you that you need a Faucet Red top electric fuel pump for your carbureted Italian luxury go-cart, but to be blunt, they're wrong.
This Carter rotary vane electric fuel pump is what you need. It provides the correct pressure for Weber carburetors, it's quieter than faucet pumps, and much less expensive. Furthermore, this is the type of pump that Fiat specs as a stock replacement for the original BCD electric pump.
When installing this pump, we recommend maintaining the return line from the engine compartment. A fuel pressure regulator is not required in this configuration.