Chevrolet took a brace of Sonic concepts to the 2011 SEMA show, among them four variations on themes from the Z-Spec parts bin, the Super 4 Racer for the track, and a brazen red hatch called the Sonic Boom. Based entirely around a 4,000-watt Kicker sound system, the Sonic Boom contains a high-tech head unit controlling components designed with a jet theme, and a report on the Chevrolet Sonic forum indicates it’s headed for production. Funk Flex