Originally Posted by ufoz8mycow

It seems like every time I talk to someone about it I am told a different class...

So would a stock 370Z (non-Nismo) be A stock or B stock?

Slightly modded 370Z would jump to ASP?

I guess it doesn't really matter too much unless you are competing at national level. Every time I tech at my local SCCA autoX they basically just make sure the wheels are bolted on and your battery is tied down. Nobody checks things like treadwear rating on tires, suspension mods, etc.