With an estimated 255 turbocharged horsepower, a six-speed manual transmission and an advanced, adaptive all-wheel-drive system, the Buick Regal GS show car was a high-tech, high-performance version of the brand's sport sedan. On display during the 2010 Chicago Auto Show, this idea car represented the 21st-century successor to Buick's Gran Sport heritage. Exterior and interior cues included two additional vertical front air intakes, forged aluminum 20-inch wheels, performance tires, a racing-inspired sport steering wheel and metal pedals. Recaro front seats featured four-way lumbar support and cushion extensions. Further custom elements were unique rocker panels, an integrated rear spoiler, dual exhaust outlets, Olympic White paint and satin metallic accents. Inside, the Regal GS varied from the standard Regal by featuring a completely jet black interior which included the pillars and headliner. The instrument panel glowed ice blue when the driver engaged the sport mode of the Interactive Drive Control System (IDCS).