Actually the current Corvette, the best Corvette made thus far, uses a wooden floor! Similar construction as a ski, reason being GM engineers said they were unable to find any man made materials that exhibited all the traits that only wood had. Believe it or not.
Edit: here is an articleThe Corvette Gets Balsa-
When engineers at Detroit-based General Motors began designing the floor structure for the 1997 Chevrolet Corvette sports car, the design requirement was for a cost-effective flooring material featuring low mass, high strength and stiffness, and good damping characteristics to help filter out noise and vibration. Previous Corvette models had floors of galvanized steel. Looking for better-performing alternatives, the engineering team considered an aircraft-type composite structure in which one of several high-tech synthetic fillers would be placed between glass-fiber/resin panels. A balsa-wood core in the floor of the new Chevrolet Corvette provides high strength and stiffness, lower mass, and good damping performance
When someone suggested using balsa wood as the filler, "everybody laughed," said Corvette engineer Tadge Juechter. Test results, however, showed that none of the synthetic fillers matched the stiffness, light weight, and damping performance of the natural balsa-wood core, and the engineers chose the balsa design. A high-density balsa wood grown in Ecuador is used in between the glass-fiber panels.