SCCA Car Requirements

What are the requirements to have make your car legal to race. Any modifications, or upgrades, anything? I am thinking about attending a SCCA driving school so I can participate in races. So, I want to know if I have to do anything to my car. Thanks!:)

http://scca.org/

Have you looked through their website? It has all the info you need, just look up the type of racing you want to do and see what it requires.