I was about to say that. The jaguar XJ220 is illegal here in the states unless you use some collector car registaration methods. You can't drive more than 1k miles per year or some ridiculously small ammount.

 

Cars like the XJ220 and McLaren are brought in via ICI. They certify it for highway use the same way a Skyline would be.

In the case of the McLaren it required (in 1997) the removal of the 2 side seats, adding a front bumper and changing out the headlights. That's what the company that brought one of them over has said publically anyway.

Don't forget for $1M you also get a gold plated titanium tool set and a CD player that can withstand 1.5G with the car among other goodies

 

some video in the archive on one of my hard drives talks about bringing those cars into the states. The XJ220 was one that they talked about. They said nothing about modifying it though. Something to the effect of "it will only be driven to shows and shown in collections". Basically, they let it in on good faith that it won't get driven on the regular on public roads. They may have left parts out of the video though, some mods may have to be done.

 

That particular McLaren was imported under a different set of rules than the XJ220 in whatever video you're talking about.

The XJ220 was most likely done under a Temporary Import for display (this is the one that's under at least a time limit, I'm not sure about the milage one) while the McLaren was done via an ICI and can be driven on public roads. As a matter of fact the guy that bought it drives it to work everyday o_O