When Maserati launched the third-generation Ghibli executive sedan in 2013, the automaker announced that the new proprietary V6 twin-turbocharged petrol mill is manufactured by Ferrari in Maranello. But did you know that more recently, some V6 blocks are cast in a plant in Indiana and machining is done at the Trenton Engine Complex in suburban Detroit? Yes, you heard that right. The 2,979 cc twin-turbo V6…