1961 Ferrari 250TR Spyder engine fitted with 6 Weber 2 barrel downdraft carburetors

Weber carburetors were originally produced in Italy by Edoardo Weber as part of a conversion kit for 1920s Fiats. Weber pioneered the use of twin barrel carburetors with two barrels (or venturi) of different sizes, the smaller one for low speed running and the larger one optimised for high speed use.

In the 1930s Weber began producing twin barrel carburetors for motor racing where two barrels of the same size were used. These were arranged so that each cylinder of the engine has it's own carburetor barrel. These carburetors found use in Maserati and Alfa Romeo racing cars.

In time, Weber carburetors were fitted to standard production cars and factory racing applications on automotive marques such as Abarth, Alfa Romeo, Aston Martin, BMW, Ferrari, Fiat, Ford, Lamborghini, Lancia, Lotus, Maserati, and Porsche.

In modern times, fuel injection has replaced carburetors in both production cars and motor racing. Weber fuel system components are distributed by Magneti-Marelli After Market Products and Services.