I have made a set of F1s fall to bits at the ring under my M5. So deffo not them (well said, Stu!)

The Pilots on the CSL are the Cups - do not be confused they are not the same as the Pilot Sports! Also I believe the CSL tyres are a 19" fitment, for the correct ones.

If you want a money-no-object solution, then I will give you the advice I was given by the guy I met at the ring (who owns the driving school that operates the Alfas if anyone has been) who owns an M5 -

Buy the Pirelli P Zero Corsa system tyres on the right tyre sizes for the Porsche GT3 (ie slightly smaller on the front, and slightly bigger at the rear). He reckoned these equated to 15sec improvement at the ring!!!!

If I ever took her back to the ring, that is what I would do. Not cheap though

JJ