I've been thinking about lowering my XJR to get that "VIP" look going on, and recently got motivated when I saw a X300 that was bagged in Belgium. I had a few questions to start.
First, what would I need to do this? I know the car comes with air ride already, would I need to completely redo the suspension like on a struts/springs car, or are there add-on kits to get the look and functionality I desire?
​​​​​​Thanks,
Alex

 

Your 2000 does not already have air-ride already. That was the later X351 models that did. Your XJR would have CATS shocks, which are a different beast. As far as the rest, there are very limited options for suspension kits pre-existing. Mina Gallery makes some lowering springs (about 1") that are designed to work with the factory shocks. So if you want to lower it THAT far, it's going to be a complete custom kit from start to finish.

 

Google J complete from Japan

 

 

Some more inspiration - I believe this uses an AccuAir kit, but no idea how much work was involved making it fit
Keep It Simple: A VIP XJR - Speedhunters