I have only had a brief run with it, but it seems to be the usual F1SR quality stuff. Lots of fun and quite challenging to drive. It appears to be the 1998 model, one of the infamous backflippers
http://f1-sim-racer.co.uk/index.php/forum/29-f1sr-porsche-911-gt1/47-f1sr-porsche-911-gt1-released
http://f1-sim-racer.co.uk/index.php/forum/29-f1sr-porsche-911-gt1/47-f1sr-porsche-911-gt1-released