The objective of this thesis is to optimize an existing design exploiting the potential of additive manufacturing to a case study. The evolution of the additive manufacturing (AM) technology has opened the opportunity to combine topology optimization and additive manufacturing to develop new designs to be lighter, cheaper and more efficient. This thesis work is inserted in a design review where the opportunity to assist to the development of every phase of the design process, which goes from the identification of suitable candidates for AM, is associated to the exploration of different concepts, the design of the definitive concept, and finally the definition of the topology optimization and the smoothing.