Isn't it one of Rob's (mobilerobbie) as that car in the front/side view has been about quite a while. (Just noticed its RHD so I am probably a long mile off that comment)
It also appears on the thread showing most known Kobras here :
But without the stripes and the side exhaust - intriguing development of it therefore.
Nice wheels (wonder what they are).
Side mirrors are interesting too - not quite bullets.
I assume the pipes are only that side as exhaust on the Z3 is usually down the one side.