 If desired by the customer, even the trunk can be fully lined with leather as part of the Custom Trim Package that also included upgraded center console, door liners, and instrument panels.Alcantara was extensively used in both the interior headliner and the trunk.Customers could choose to upgrade the BMW's already potent engine with Fisker's "Performance Plus" package, which took the M6 engine from 500 peak HP to over 650 HP.