Safety cage

[Ksysio]

1. this will require a lot of time 'cause it needs to be modeled for each car separatly.
2. Safety cage in street racing? wtf? how is that even possible?

Why its not possible? Roll cage is normal part of performance tuning....

I didn't said that this is not possible.
For me it ruins a bit that "illegal(ish)" atmosphere of street racing.

Roll cage is not only for safe. It also makes car stiffness. You wrong thinking "roll cages ruins illegal atmosphere". There is also half roll cages for custom seatbelts. This half rollcages you can see in initial d cars.