Chevrolet Unveils Nine High-Powered Concepts At SEMA

American Motorcycle Association champion, X-Games gold medalist and NASCAR driver Ricky Carmichael (left) and Team Chevy NASCAR driver Jeff Gordon with Carmichael's All-Activity Sonic concept and the Jeff Gordon SS Performance Sedan concept after their introductions Monday, November 4, 2013 at the SEMA Show in Las Vegas, Nevada. (Photo by Isaac Brekken for Chevrolet)