This video features a BMW E60 M5 V10 which has been modified with an Eisenmann exhaust system, no mid muffler and equipped with a dual Guerrilla bypass valvetronic exhaust system. You can hear the difference while revving the engine while the valves are open and closed! 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