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.
Lampredi's first achievement was the creation of the experimental 275 S. Only two of these racing barchettas were built, using a modified 166 MM chassis and an experimental 3.3-liter V12 engine.