Well I have a header, intake, exhaust, and coil overs so I'm def going to be ST class I suppose lol. Whats that mean anyway? I'll just be going up against tougher competition?
i haven't ran in ST or STS class this year(rules change from year to year). But from two years ago when i ran my integra in STS, you can do anything you want for power as long as you don't do anything behind the throttle body and before the exhaust headers. So basically, no forced induction and not internal work. You can have any type of suspension you want as long as it still works in the same manner as your stock. i think the major differences between the ST, STS and STU are wheel restrictions and limited slip differentials(lsd). No carbon fiber anything in that class. Can not run stripped, must still have seats. Off this the street touring classes so ONLY STREET TIRES ARE ALLOWED with treadwear of 180 or higher. NO NItto NT01. The best tires this year for the Street Touring are the Dunlop Z1 Star Specs.
Above all just try to have a lot of run your first time out because you won't even come close to average driver there. Everything time you go out, you'll get better. After a while you'll realize all the wront things you've bought and all the things you need. things will go from buying new parts to buy newer better tires and more seat time. After about your 8th event, if you good, you start knocking on the doors of the pros times.
Just to give you a little feed back. I am currently on my 10th event since i ever started and now knocking on the doors of a professionals times. Last time i went out, i ran a 38.618 on flakin RT-625 while the professional was on Hoosier slick and he only beat me with a 37.923. usually slicks will give you an easy 1 second off your time.
Once you get to this point, you'll find yourself looking for sponsors.:thumbs up