Why oh fcuking why to peeps spend £20k or more on a car which was designed to run on specific high performance OEM specified boots, to then completely trash the handling, your own personal safety, and that of other road users - by fitting cheap shyte "nippon-no-grip" CRAP tyres.
Any person who does that should have their gonads removed by hand, and nailed to the nearest road side tree!
Get some decent boots - my personal recommendations would be Michelin Pilot Sport PS2, Michelin Pilot Exalto PE2, or Conti Sport Contact 3.
I know others have recommened Bridgestones, but I would strongly recommend NOT using them. I have personally experienced truely shocking performance from Bridgestones, but also reasonable performance too. Anthother poster here, Schrodingers Cat, if I remember correctly, also had a torrid time with Bridgestones on his GTI, which was transformed when he swapped them for Pilot Sport 2s. I think Bridgestone can make a decent tyre (the S03 for one), but they suffer with very notable inconsistencies. The RE040 was truely shyte, and IMHO dangerous. The RE050 seems to be offering some quite different and opposing opinions.