Make some friends and talk to the other racers. We love helping out newbies because it's fun to edumacate others about racing.
With the header and high flow I want to say STX, the rules are a little hazy here (as they are pretty much all over that massive rulebook). If the cat is <4" downstream from OE location I think that's where you are, otherwise it's going to be SP or SM. But if they are not strict about classes just go into STS and don't worry about it too much. It is your first time after all.
Yes, that is a banana in my pocket.
Dan - gump
[BBS][Borla][Focus Central][Hella][K&N][Koni][Lentech][Wings West]
Wiregrass Region SCCA