[diirk]

What ^^^ said.

I ran my car totally stock on the track a few weeks ago. It did just fine. No brake fade, minimal tire wear, handling was reasonable. I think for the first few trips to the track, running stock is a great way to learn the car. Bring a decent tire guage and call it a day. Check your temps cold then hot. If you're getting over 40psi hot, drop it a pound or two. 38psi hot seemed to work well for me on stock tires on a road course.

Pyrotech makes a good helmet. No worries there.

and as a disclaimer: this isn't my first rodeo. I've run a few events before in a variety of cars. The most important thing to prep for the track is yourself. Go there and learn.