The Furai (風籟, Fūrai), meaning "sound of the wind", was the fifth and last of the Mazda Nagare line of concept cars that have been made by Mazda since 2006. The chassis was based on the Courage Compétition C65 Le Mans Prototype that Mazda last used to compete in the American Le Mans Series, two seasons previously[3] and was designed to use E100 ethanol fuel, it was powered by a heavily modified 20B 3-rotor wankel engine that put out 450 brake horsepower (340 kW). The engine was developed and built by renowned rotary tuner, Racing Beat, who also built the car's rotary-shaped muffler canister.[6]and 3 models in the world