[sperry]

You don't need insurance for autocross. If you injure yourself or someone else the SCCA's insurance should cover you. You won't find insurance to protect your car at a competative event... unless you're willing to pay $500/day or so, you might find something. But you really don't need insurance for autocross... worst thing that happens in a street car is hitting an orange cone. Unless you're insurance agent is someone like ArthurS who's done autox... you probably don't want to call your agent.

A set of summer tires will usually last most of a season, including daily driving. You *don't* want to get larger wheels. 17x8 is what you should run, in fact, the STI has excellent, light BBS wheels from the factory that you should race on. Those are light, and strong, and the correct size for staying in stock classes.

Since you should be running in the Novice class, all you need to do is show up w/ $35/day, about half a tank of gas, 40 psi of air in the tires (the stock wheels and stock RE070 tires are *excellent* tires for autocross... lots of people actually go out of their way to get those wheels and tires to race on), and an M95 or SA95 or newer helmet (since the loaners suck). A tire pressure gauge is useful, but you can probably borrow one.