Rear Drive shaft length differences

[sandbagger]

google is failing me, vin into realoem returns 2 different possible rear drive shaft length, 1325(52.16") 1347(53.02") for a 2004 3.0L auto

I climb under and measure, I get 51.2 with a tape measure, now that is to the hub on the rear diff(part is inside that, and to the bolt mating flange on the flex disk)

Does the official length include the pilot bearing tip that is inside the front flex disk?

Now I did find the 2000-2003 shaft 26107510001 1273mm/50.12 but ebay stores are calling it at 51.4

This X 5 is one of the ones with that oddball front shaft that was short and needed the longer one so I am not trusting much