and LSD bumps you to FSP
i cant remember what cat is legal in ST... classes, assuming you had a legal, the foci are in STF. a focus can never be in STX or STC, or STU. All the street tire classes are car specific. ie, a car only fits in one class.
May 2014 ROTM
for auto-x: '04 Liquid Grey ZX3
for street: '02 Infrared SVT