In honor of the 70th anniversary of Maserati's first Indianapolis 500 win, the automaker launched a special edition of the Quattroporte sedan at the North American International Auto Show in Detroit in 2009. The Quattroporte Sport GT S sees an upgrade to 433 horsepower, a tuned suspension, a sports exhaust and styling modifications.
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Maserati says that remapping the engine delivers 433 horsepower, an upgrade of 8 horsepower over the 425-horse Quattroporte S. The transmission software has been reprogrammed to allow for faster shifts, as well. To make it handle the power bump, Maserati has stiffened the springs and lowered the ride height and, to provide what Maserati calls a "deep, throaty sound," the GT S features a sports-exhaust.
Outside, the Quattroporte GT S gets red accents, new headlamps in a metallic titanium finish and shadow-line finishing. GT S buyers are treated to new Alcantara and leather-covered seats an titanium-colored Titanex composite trim inside.



