What about modifications designed to protect the car? I've got some friends who currently track their cars and they suggest at minimum swapping out the brake pads with high performance ones, otherwise you will wear them out very quickly. They also suggest getting track tires to protect the tread on your street tires, but since the ST comes with Eagle F1 A2's and I was already planning to get some winter tires, I'd rather not spend an additional $800+ on a 3rd set of tires for the track (even if I did have room to store them).
Basically, I know that performance mods are still in development and I'd like to hear what people plan on doing down the road to boost performance. But I'm really curious as to whether tracking the ST as-is would adversely affect it's handling and performance on the road. If I'm gonna need to buy a new set of brake pads after every track day, I'd rather just buy a performance kit that let's me swap out pads for track days, or maybe even spring for a pair of ceramics.
You will go through pads more quickly, but if the stock pads are worth their salt and you aren't threshold braking at every corner, then you should be fine for many track days.
My MX-5 stock pads (and stock replacements) usually lasted me about 20K miles per set. A little longer on the rears. But its a lighter car, too. I also spent a LOT of time on track with the car. Probably 20-25% of its total mileage. I suspect you won't see that much time in your ST (nor will I see that much in mine).
The car *should* be able to handle a standard HPDE with ease. If it can't, the car has a problem.
You don't need anything to be able to go out and have fun for a few sessions. AFTER the track day, you might have a look at the brake fluid and pads and see how things are holding up.
I have mentioned before and am still curious about how the TVS is going to affect brake wear/heat on the track, since it'll likely be active on most turns and certainly all tight ones.
FWIW, my intention is to give mine a test run on the track ASAP after delivery, just to find out what it feels like at the limits and how the TVS is going to work at the limit, as well as how it will affect brake wear.
Someone may beat me to it, but I'll report as soon as I can.