Found this on GAF -
Regarding Engine Sounds of Gran Turismo Part 1 - By Kazunori Yamauchi
http://pitstop.gran-turismo.com/en/article/26
Regarding Engine Sounds of Gran Turismo Part 2 - By Kazunori Yamauchi
http://pitstop.gran-turismo.com/en/article/37
Nurburgring 24H
http://pitstop.gran-turismo.com/en/article/65
The 24 Hour Race of the Freshmen
http://pitstop.gran-turismo.com/en/article/94
Regarding Engine Sounds of Gran Turismo Part 1 - By Kazunori Yamauchi
http://pitstop.gran-turismo.com/en/article/26
Regarding Engine Sounds of Gran Turismo Part 2 - By Kazunori Yamauchi
http://pitstop.gran-turismo.com/en/article/37
Nurburgring 24H
http://pitstop.gran-turismo.com/en/article/65
The 24 Hour Race of the Freshmen
http://pitstop.gran-turismo.com/en/article/94