Model celebrates Maseratis 70th anniversary fir Indianapolis 500 win. 4.7L V8 making 433-hp. Upgraded front and rear suspension.

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 it says is a a real driving machine in the guise of a luxury sedan.

There are no performance figures yet on the 433-hp sedan. Maserati said that it has upgraded the gearshift management software, the front and rear suspension system with single rate-dampers, stiff springs and a lower ride height, and a new sports exhaust that creates a deep, throaty and captivating sound.

The 2009 Maserati Quattroporte GT S also gets an aggressive look with a new black grille with concave vertical fins featuring the Trident logo with red accents, new headlights in metallic titanium finish, the side and rear shadow line which includes black finishing around the doors, body-colored door handles and black twin oval exhaust pipes. Inside the Quattroporte GT S has new M-design seats with perforated Alcantara leather upholstery and a Titantex trim.

2009 Maserati Quattroporte GT S: