  We show that the projectivization of the exceptional rank 2 vector bundle on
an arbitrary smooth V14 Fano threefold after a certain natural flop turns into
the projectivization of an instanton vector bundle on a smooth cubic threefold.
And vice versa, starting from a smooth cubic threefold with an instanton vector
bundle of charge 2 on it we reconstruct V14 threefold.
  Relying on the geometric properties of the above correspondence we prove that
the orthogonals to the exceptional pairs in the bounded derived categories of
coherent sheaves on a smooth V14 threefold and on the corresponding cubic
threefold are equivalent as triangulated categories.
