What you see here is a 1200HP 9ff Porsche 997 Turbo MkI participated on Supercar Sunday at circuit TT Assen. The turbo whistle is truly amazing!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#9ff #Porsche #Turbo