60 Neiman Marcus Quattroportes was finished in Bordeaux Pontevecchio (wine red) exterior colour and featured a chrome mesh-front grill along with side vents and 19-inch ball-polished wheels. The interior was upholstered in ivory Poltrona Frau leather accented with Bordeaux piping and mahogany wood trim. At the Frankfurt Motor Show in September 2005, Maserati introduced two different trim levels for the Quattroporte, the Executive GT and Sport GT. The Quattroporte Executive GT was a comfort and luxury-oriented specification; it came equipped with a wood-rimmed steering wheel, an Alcantara-suede interior roof lining; ventilated, adaptive, massaging rear seats, rear air conditioning controls, veneered retractable rear tables, and curtain shades on the rear windows. The exterior was distinguished by 19 inch eight-spoke ball-polished alloy wheels and chrome mesh front and side grilles. The Quattroporte Sport GT variant offered several performance upgrades: a re-configured transmission providing faster gearshifts and a firmer Skyhook suspension system; courtesy of new software calibrations, seven-spoke 20 inch wheels with low-profile tyres, cross-drilled brake rotors, and braided brake lines. Model-specific exterior trim included dark mesh front and side grilles and red accents to the Trident badges, as on vintage racing Maserati models. Inside, there were aluminium pedals, a sport steering wheel and carbon fibre in place of the standard wood inserts. A new 6-speed ZF-supplied automatic transmission was presented at the Detroit Motor Show in January 2007, with the first cars delivered right after the launch, marketed as Maserati Quattroporte Automatica. As all the three trim levels were offered in both DuoSelect and Automatica versions, the lineup grew to six models. The Quattroporte Sport GT S was introduced at the Frankfurt Motor Show in September 2007. Taking further the Sport GT's focus on handling, this version employed Bilstein single-rate dampers in place of the Skyhook adaptive system. Other changes from the Sport GT were a lowered ride height and 10 mm wider 295/30 rear tyres, front Brembo iron/aluminium dual-cast brake rotors and red-painted six-piston callipers. The cabin was upholstered in mixed Alcantara and leather, with carbon fibre accents; on the exterior, the door handles were painted in body colour, while the exterior trim, the 20 inch wheels and the exhaust pipes were finished in a "dark chrome" shade. At the 2008 North American International Auto Show, Maserati launched the Quattroporte Collezione Cento, a special edition of the Quattroporte limited to 100 examples. Its unique specification featured an ivory paint colour with