The Saleen S7 is an American hand-built, high-performance supercar designed and built by Saleen Automotive Inc. Developed jointly by Steve Saleen for the initial concept, direction and engine, Hidden Creek Industries for resources and initial funding, Ray Mallock Ltd. (RML) for chassis, suspension and aerodynamics, and Phil Frank for the body and interior CAD design and development, it was the first fully proprietary car produced by Saleen and became America's third mid-engine production supercar coming after the Vector W8 and M12. The S7 debuted on August 19, 2000 at the Monterey Historic Races. The all-aluminium engine is a bored-and-stroked derivative of Ford's 351 Windsor small block with Cleveland-style canted valve heads, not based on the FE big-block. It proved remarkably tractable and flexible for such a high-output unit—550 hp (410 kW) at 6400 rpm. In 2005, the S7 gained a more powerful twin-turbo powerplant which boosted engine power to 750 hp (559 kW) and top speed to 248 mph (399 km/h).