Regarding fuel, Mark sent out an email a couple of days ago reporting that there were pump problems at the track location, and fuel may not be available on race day – his suggestion was to bring your own. For a shifter, 4 gallons might suffice, but 5 or 6 would be better. Oil is open, use what your builder recommends.
Tires are open, but most will probably be running MG yellows/whites or Hoosier R60’s. Same tires must be used for the two races – late Saturday and Sunday.
Make sure you have an airbox – the consensus is that it would be highly unlikely that an open filter would pass 92db.