I think the S2k needs wider tires. Especially if you go with a SC or Turbo app. The one problem with the S2k is that it is a perfect car for stock applications but once you change something, you need to go slightly wider. I know a few people that keep a 255 on the rear with a SC and the car really likes to spin. More rubber will slow the S2k down a bit but will give it much increased handling. I guess it depends on what you want to do. I will never drag race my car unless I figure out a new rear end for the car. But I definitely will run it on the track and Autocross.. And wider tires will help me out quite a bit. Although when I autocross, I will keep the car as close to stock as possible since I don't want to run against ZO6's and Vipers..