1. P1 Real racing prototypes---what it's all about
2. GTE/GTLM Real racing GTs (most of 'em)
But BoP is always a problem here and always will be now that cars are purely commercial products and racing is an afterthought
3. FIA GT3 Real Racing GTs but as with GTE, BoP is always an issue
4. P2 Lower-cost modern prototypes--the entry-level, pro-Am class
5. PC Even lower cost modern prototypes--shouldn't be in a top-tier series but the top of the support series
6. GTC/GTD Should be the support series GT class
7. DP Should be historic racers