I know the XR range had a minor update towards the end of the AUII range. I think it was at the same time as the XR8 got the 220kw motor. I know they all got colour coded mirrors and I think some other little things. Oh and the XR6 VCT got 17" wheels as standard (same as the XR8).
BAII XR6T, Lightning Strike, M6, Sports Steering Wheel, 18" Wheels.
"Anyone can drive in a Straight line"