Ready for a feel-good shock to your system? Take a look at Buick's new Regal GS concept sports sedan. Rough and ready looking, with enough street cred to stand it in good stead, the Regal GS serves notice that Buick is ready to hearken back to performance models like the Buick T Types, Stage Two Skylark Gran Sports and the like. Those who remember those cars know that they were sleepers that provided stormy performance when needed, while serving up generous doses of luxury, too. The new Regal GS isn't far from that mold. Powered by a 255 horsepower turbocharged engine and a six speed manual, this is one Buick that will rocket ou to 60 in less than six seconds. There's also an Interactive Drive Control System to help you custom blend the kind of road going performance you want while underway.?And it comes with adaptive all wheel drive with an electronic limited slip rear differential, both features found on the most well-balanced sports sedans. The car comes with a number of features to help you distinguish it from other Regals, including a lowered body and lower center of gravity. There also are two additional vertical front air intakes; large, forged aluminum 20-inch wheels and performance tires; a racing-inspired sport steering wheel and metal pedals. Recaro high-performance front seats feature four-way lumbar support and cushion extensions. The Regal GS exterior is distinguished by vertical air inlets in the front fascia, as well as unique rocker panels, an integrated rear spoiler, dual exhaust outlets, Olympic White paint and satin metallic accents. The idea behind the Regal GS was taking the production model in a more aggressive direction to appeal to performance enthusiasts, said John Cafaro, Buick design director. But along with its aggressive stance, there's sophisticated style in the design that complements the driving experience. Inside, a news release says, the Regal GS varies from the standard Regal by featuring a completely jet black interior, including the pillars and headliner, sport shifter for the six-speed manual transmission and a suede-covered, flat-bottom steering wheel reminiscent of those used in international racing series. The instrument panel glows ice blue when the driver engages the sport mode of the Interactive Drive Control System (IDCS). With this system, the driver selects among three operating modes normal, sport and GS that change the suspension settings, throttle response and steering sensitivity through the variable-effort steering system.