Lange Concepts was a small American design-and-fabrication marque created by industrial designer Joshua Lange in Los Angeles. The company focused on hand-built, Corvette-based one-offs in composite materials rather than series production. Its best-known project, the Pangea, debuted in the main hall at the 2003 SEMA Show and featured a carbon/Kevlar body over GM mechanicals; later descriptions cited an LS-based twin-turbo V-8 and six-speed…