Phil- I disagree. There were several options for seats on the HGTE models. One owner here did not like the HGTE seats at all, so specced standard 599 seats. Most of the HGTE conversions were on earlier 599s, not the very late models. If she has the HGTE alcantara seats, which she does, that points to a factory HGTE, since those seats were not available on standard 599s.