The ITG Ram Pipes have been specifically developed to fit the Weber DCOE carburettor systems and will not fit Dellorto Type carburettors.The Ram Pipes range is available in various lengths depending on the required filter spacing and carburettor running requirements, and are available in the classic diameters of 40 and 45mm. Please note: 37mm of the ram pipe "slots" into the carburettor (this is not included in the length listed in the drop down menu).items are supplied individually.