What parts to check after track days to avoid mechanical problems

BGTV8

Wheels studs - mine (ARP) are lifed @ 2 years .. wheel nuts at the same time - I don't use ali nuts - if you do, they need to be replaced every "n" times they are torqued where N is ~20-30
Coolant hoses are replaced @ 3 years
Calipers ought not need replacement, but certainly service them with replacement seal kit and new pistons.
You should have braided lines already, replace if the braiding has fretted or appears worn/frayed
Check backlash in the diff - may need to replace the crushable spacer - if so, do pinion and carrier bearings plus seals as well
Check state of CV joints in rear axles - also splines into drive flange/rear hub
Check state of front and rear wheel bearings
Check state of ball joints in front suspension
Check steering tie rod ends
Check steering rack mounts - they have been known to develop cracks especially if you like "yumping" kerbs
Check state of all suspension bushes - if you have replacement bushes (SPL etc), check for wear
Check state of serpentine belt/accessory drive belts
Check wheels "carefully" for cracks against the hub/centre and where spokes join the wheel barrel, and/or rim edge damage
Change all fluids (brake, clutch, engine, gearbox and diff)

That will help you while-away the break ....