Thats what I thought, frazze. We weren't born yesterday you know.
No 480HP 3-series that is still street legal is going to drop bellow a 7:40 in the ring (not even a 480HP supercharged GT3RS), let alone 7:30. Notice I say street legal, cause if it ain't street legal, then there is no merit or difficulty in it.

The CSL is a great car, don't get me wrong, and as you say it does 7:50 around the ring in stock form, though other cars don't use R-compound Pilot Cups as stock which in a 20km course amounts to 5-10 seconds right there with no merit to the car. But to put it another way, but just becasue I put NOS for example on a 996 Carrera doesn't mean I'm going to out-drag a McLaren F1.