Track...Drag, Road Race, or AutoCross???
I'm assuming Drag race.
Yes it's fuse 46, and that would be the only type racing to pull it for.
If you're doing either of the other 2, forget about pulling that fuse, unless you like spinning out.
^^^It will give you a 50/50 F/R brake bias...not something you want when taking turns.
As far as the gas, I wouldn't waste your money, unless you can have someone give you a tune for 108 octane on short notice.
In addition, if it's leaded, it will plug up your CAT in a heartbeat.