Yea, it sucks to go backwards, mods-wise! The thinking on those items is more categorical then vehicle specific. The flywheel, for example, isn't really "Needed" to go racing, so why allow lightened versions? If allowed, everybody has another item to spend money and time on.

That said, if you are going to be just starting, and doing the schools, etc, it's not paramount that you get those items legalized before you turn a wheel. For your school, the car must meet the safety regs....class legality isn't an issue.

Now, when you lead your first ITA race, well, thats another story!