Hey fellas, anyone on here auto-corss there car? I am building my S2000, for track use, as of know here is what I have

Greddy Turbo <------just over 300HP at the wheels
Competition Clutch Stage 2 Clutch
Competition Clutch 11.5lbs Flywheel (stock is 22lbs)
Stock suspension for now
Putting in an Oil Cooler

What else, what kind of Brake pads?, also what kind of certification do I need to get starting doing simple Auto-crossing, followed by Road course in the future