This video features some amazing nardo grey Audi RS3 Sportback with valve tronic exhaust system. This means the driver can open/close the valves in the exhaust system. The backfire exhaust sounds are just phenomenal! Liked the video? Click the 'like' button, comment, and subscribe!Follow me:Subscribe: http://www.YouTube.com/GUMBALFACEBOOK: http://www.fb.com/GUMBALTVINSTAGRAM: http://www.instagram.com/GUMBALTVTWITTER: http://Twitter.com/GUMBALTVhttp://www.gumbal.tv