I photograph a design of run society performed in Fuji Speedway on April 7, 2007 with an in-vehicle camera.
Green Porsche gets out of the course after having been able to pull 100R. TOYOTA CALDINA of FSW came for help to the next lap.(^.^)
This is exhaust sound of a Copen titanium muffler made by MARTIANCRATE.
Unlike a muffler of stainless steel material, titanium makes a good sound.
I like this exhaust sound very much. (^ _ ^)♪