You need to think about their road tyres aswell. They will over heat aswell as their brake pads as they arent made for flat out lap after lap trackdays.
I'm assuming you have been on quite a few trackdays and know how your car drives and that you have some form of track brake pads to take the heat and punishment so you can brake later than your mates with their cooked pads and brake fluid and then keep faster cornering speeds with tour R888R tyres?
Unfortunately, I think I'm only just out of the novice category of track day drivers. still got a lot of learning to do.
My few mods are : (182 with cup packs)
rear seats removed (for van abilities more than anything),
eibach sportlines iirc,
motul high temp brake fluid,
brembo hc discs
ferodo ds2500 pads
braided brake lines
custom brake cooling ducts
15" team dynamics pro race 1.2 (either rainsports 2 or r888r depending on weather)
oh and drivers bucket seat.
this will be the first time i ran that brake setup with r888r's. doubt the ds2500's will be able to keep up with me standing on the brakes every turn.