Anyone have any experience with these for the track?

I have been using my Mich PS2s and I like the fact that I can feel when they start loose traction. The tread rating is 220.

The Dunlops are 200's..................I have read some good reports on these tires and thinking about going with 18" wheels on my 997S.

Thanks for any input........................

 

The Z1 are great tires. They are very predictable and give you great control on turn-in. They are almost as good as my full treads RA1 or A048.