I have the 181 pulley and ran 12.92 @ 111.51mph last week on Kumho Ecsta SPT's with TC on. This was the first time I have raced and I made 7 passes with the TC on all the time. I got a little spin every time and the TC kicked in. I dont have a tune yet but I am sending the ECU out to LET today.

I am also sure that I saw someone here has put 285/35's on stock 19 inch wheels. The tire shop didnt enjoy it but they got them on and he was happy. I am debating the 275 vs 285 for when I need to replace mine.

MikeR