TR250-TR6 early carburettor model. Inlet manifold to accept 3 Stromberg carburettors, come with throttle mechanism adaptors can be used for 3 SU 1-3/4'' carburettors but customer will have to devise their own throttle mechanism. Note the 'N' in the part number refers to the narrow spacing of the inlet ports. (48mm centres).

This part is listed on the following page of the website, where further information and background reading may be found.