The car doesn't need much. I have friends who were lapping one at Fontana and were within 1.5 seconds of the T4 track record in a bone stock car with a passenger (which would be similar to the T4 weight). The only mod was a set of 2 year old BFG R1. Not the S, the harder compound.
I can only assume the car would be even better at a handling/braking track.