Here we have a complete oem bose bassbox from a 2013 Maserati GranCabrio Sport, it should fit all 2007+ Maserati Gran Turismos with this speaker option, it does in the passenger side footwell. verify with your dealer to be certain it will work for you, there is no damage to the parts whatsoever and is in bolt on condition and fully functioning.
Let me know if you need any other parts so I can set up an auction for the items you need.