will these 18 fit my 01 xjr??

4 - 18" SSR GT3 wheels

Front Wheels:
18 x 8.5
+43 offset

Rear Wheels:
18x10
+24 offset

Bolt Pattern 120/5

 

http://www.1010tires.com/WheelOffsetCalculator.asp

The bolt pattern should work, although the Jag's pattern is 120.65mm X 5.

Are those wheels for a BMW?

 

they are off a bmw.. will they fit my xjr.. even with the tires??? with no rubbing??

 

I'll leave the offset and fender question open, but address the bolt pattern. Owning both Jaguars and a BMW, the .65mm is a "problem". Also, both these wheels rely on a hub-centric centering system, but they are different. Even if you can get the hub-centric part working, you don't want to try to "crunch" the .65mm bolt pattern difference.

If you just have to have these, and the offset/fender clearances are answered by someone, the only correct way to do these is to have a spacer machined with the correct bolt on pattern/hub for the Jaguar, but with studs pressed in on a different circle pattern and hub shoulder machined in for the BMW wheel needs.