Mike,
You remember the Firestone 500's on a Pinto? Manufactures' going cheep on their products caused all the regulations. Now suppose you spin out on your Goodyears and hurt another person, what do you think your insurance company is going to say about you driving on the street with non approved race tires?
I think they'll say you have no coverage and you will pay the medical bills and damage from your own pocket, if you don't go broke first. Lawyers and insurance companies 'run' the country.
Perry.