Reducing vehicle weight is critical to improving fuel economy and addressing range, performance, size, and cost challenges associated with fuel-cell and hybrid propulsion systems. This paper describes the design, fabrication, and assembly approach used for the carbon-fiber composite body structure in Hypercar, Inc.'s Revolution concept vehicle. Reprinted with permission from the Proceedings of The 19th International Battery, Hybrid and Fuel Cell Electric Vehicle Symposium & Exhibition (November 2002).