The first outcome of Lampredi's work was the experimental 275 S. Just two of these racing barchettas were built, based on the 166 MM but using the experimental 3.3-litre V12.
O primeiro resultado do traballo de Lampredi foi o experimental 275 S. Só foron construídas dous destas Barchettas de carreiras, baseadas no 166, pero utilizando o experimental motor V12 de 3´3 l.