North American International Auto Show in Detroit, GM showed a concept GS version of the Regal, based on the Opel Insignia OPC, with a 255 hp (190 kW) high-output turbo I4, manual transmission, and all-wheel drive. GM Vice Chairman of Global Product Development, Tom Stephens, confirmed that the Regal GS is approved for production and will arrive in showrooms in April 2011.