For those that don't know the SCCA holds the runoffs once a year, as there national (superbowl) event for road racing. The class that stock camaro z28's run in is T2. All cars have strict rules,, basically they are all mostly stock with race tires, and different shocks, and the ecu programming is open.. Most other mods are banned, weights are fairly close to stock.
Here is the entry list for the event that will be held the end of september. I think it won't air on Speed until the end of Nov though.

Fbody 16
350Z 6
STI 5
SRT4 5
M3 3
EVO 3
Box S 2
S2000 2
CTSV 1
GTO 1
Ion Redline 1
RX8 1
MiataSpeed 1

Total 47

GM 19
Nissan 6
Subie 5
Dodge 5
BMW 3
Mitsu 3
Porsche 2
Honda 2
Mazda 2

Subaru is 20% owned by GM so if you include them, GM owns the field!
Check it out!
scca.org