I'm sure some people on Oppo know the answers to these relatively simple questions.
From my understanding all you need to go autocross-ing is a helmet and a battery tie down. When it comes to helmets I'm at a complete loss. Will any DOT approved helmet do? Of course no one plans on crashing but is buying a SNELL approved helmet recommended? Or not really needed because I'll be in a car and not on a bike. Hell, I even just watched this video & while I know what is better now, I still don't know what I want.
As for battery tie downs, my car comes from the factory with a bracket holding it down, is that sufficient?
For your troubles, some pretty images.