This time I have filmed a BMW M4 tuned by German car tuner Bimmer Tuning. It's got the Stage 2 tuning, this includes customized software ECU and downpipes (stock exhaust).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