Help! What SCCA class am I?

[JGood]

Why not STS? My car seems to fit the rules...

[2002maniac]

If they are street tires, you will be in STX. Fun class...

[JGood]

I'm trying to register online for my first autocross, and reading the SCCA class guide has done nothing more then confuse me. It looks like I can fit in a bunch of classes.

Here's what I have:

85 325e 4 door
Bilstein sports
H&R sports
The rest of the susepnsion is new, but totally stock
16x7 wheels
205/45/16 tires
LSD (stock)
Custom cold air intake
Cat back exhaust
Aftermarket body kit (BMP)

I believe those are the only items that matter, I think everything else on my car is stock or a replacement part from another e30.

I assume I'd be somewhere in Street Touring, but which one?

Is it possible to put my 14" bottle caps and stock aibox back on and run in Stock G (GS)? Or do my Aftermarket springs take me out of that?

Thanks,

Justin