Get the newer Kumho Ecsta V700, not the older Kumho Victoracer.
The Ecsta has a newer compound formulation and a bit lighter too.
If possible look for a tread compound code on side of tire of 6A. This indicates latest formula. When the Ecsta came out a few years ago, it had the same rubber compound as the Victoracer, labeled 8A, redone sometime about a year ago, should be 6A now. The Toyo is a good tire, lasts longer on the street if you are driving lots on the street too but ultimate grip for racing not as good as Kumho Ecsta. Don't expect much more than 5-7k miles on these type of tires.
Don L.