The majority of all MGB’s produced had a twin SU carburettor setup. From 1962 – 1974, on home market cars, the SU carburettors were HS4 type with separate float chambers. From 1974 onwards they were changed to HIF4 with the float bowl beneath the body of the carburettor. Export market cars had HS4 carburettors fitted until 1972 when they then changed to HIF4. Only North American models from 1974 onwards used a single Zenith-Stromberg carburettor. Early fuel tanks up to 1965 were mounted under the boot floor using straps and had a capacity of 45 litres. From 1965 onwards the tank was increased in size to 58 litres and bolted directly to the boot floor. The only further change came in 1976, with the tank and fuel system changed to allow the fuel feed to exit through the sender unit itself. We stock a wide range of MGB fuel parts of the highest quality, including carburettors, filters, fuel pump and fixings and more.