Subscribe! http://bit.ly/SubscribeToMarchettino - I have filmed a friend's BMW M4 F82 doing a few dyno runs at Romeo Ferraris. The car is fitted with a titanium exhaust made by Akrapovic, so turn up the volume! Facebook: http://on.fb.me/Marchettino Instagram: @Marchettino Twitter: http://twitter.com/MarchettinoYT