2008 Boxster S Track Tires

[BYprodriver]

I have minimal 987 track experience, but it is a slow day on the forum, so I will say I don't foresee any problems with either size other than best front size for the specific type racing you plan.

[Flavor 987S]

Do you trailer the car to the event or drive back and forth?

If you drive to the event, look into tires like Michelin Sport Cups, or Yoko AD08. You need a road worthy (and legal) tire with some track worthyness.