XK8 Body difference 2000 vs 2001
 

I've noticed the front fog light recesses on the 2000 is pretty deep. Whereas on the 2001 that are fairly shallow. Any other differences?

I think the jeweled taillights started in 2001.

Also on the interior, the seats were updated to a new style with power headrests.

You can read them here.

These 2001 juweled taillights, do they fit on a pre-2001 model?

No, some metal trimming and rewiring is necessary, but it is feasible. Also, go for the Victory edition version which is even nicer https://www.jaguarforums.com/forum/x...-gaudin-98011/ if they are still available.