At the 2009 North American International Auto Show next month in Detroit, Maserati will be celebrating the 70th anniversary of its first Indianapolis 500 win.

To celebrate the occasion Maserati will unveil a special-edition 2009 Quattroporte Sport GT S, a model that is a “real driving machine in the guise of a luxury sedan”.

The Quattroporte Sport GT S sees an upgrade to 433 horsepower, a tuned suspension, a sports exhaust and styling modifications.