STS2 GTUs for me!

Stock class permits any front swaybar changes, but the rear cannot be touched. If it came with a rear swaybar, it must be left alone. If it came with no rear swaybar, you cannot add one.
Strut bars are only allowed to have 2 points of attachment in any of the street classes. More than 2 attachment points on a strut bar will put you into a Prepared class, which also allows non-DOT slicks.
Coilovers and Camber plates are allowed in ST & SP classes.
Emmissions must be intact for ST classes, but not required for SP classes.
DOT R-Comp's are allowed in any class, except the ST classes.
Stock classes are as follows:
RX8 = B Stock
FD RX7 = Super Stock
TII FC = B Stock
N/A FC and all SA/FB = E Stock
Street Touring classes:
The N/A FC and SA/FB can go into STS2, all other ST classes are off limits.
The RX8 can go into STU.
Street Prepared classes:
FD RX7 = ASP
RX8 and TII FC = BSP
NA FC and SA/FB = CSP

Street Mod and SM2 allow almost anything, as long as the engine and body are from the same Corp/Manufacturer.

I hope this clarifies any questions concerning which class each car would be in, depending on level of mods.

*Note, I left out the old school cars, as I am not sure of their classing, not because I forgot about them.