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The exhaust pipes of the motorcycle were always exposed to high temperature exhaust gas. There was a problem of the tarnish or the rust during use, and it might be sometimes complained from a user. Therefore we developed new surface treatment and could prevent these problems. New surface treatment is “Nano-film Coating” by the DC reactivity magnetron sputtering method (PVD method). We developed SiOxNy ceramic Nano-film of the thickness of 20-150 nm on the metal substrates. This Nano-film was evaluated heat resistance, corrosion resistance, wear resistance and optical characteristics. It is able to get these performance satisfied enough. And the metal coloration is possible by controlling a refractive index and a film thickness of the Nano-film. The film was deposited in a three-dimensional shape by controlling the reactive gas composition, the gas ratio and sputtering power. The exhaust parts are colored by three patterns that is “transparent and colorless”, “gold” and “blue”.