Originally posted by RogerB:
What about ESP? (Street Prepared) Does the "suspension" have to meet OEM specs? Can the car be lowered?
For the stock classes (S or SP), does the tire sidewall have to be stock height? That is, could I mount 50 series rubber on my stock 15" wheels, even though they came with 60 series? Do the wheels have to be stock diameter?
More comprehensive suspension mods are allowed for SP, but you'll face some pretty daunting competition in ESP... hoooo boy.
And in Stock classes, you can change your tire dimensions as long as the rim remains the stock size -- or if a larger size rim was available as a factory option for your year car, you can upsize to those as well.
