This is more flexible server when it comes to cars restriction.
The only rules that matter here are that the cars are from the historic era and have a relative balance of performance (BOP).
All sorts of tyres and also racing cars are allowed here.
At the moment the grid looks like this:
PORSCHE 911 CARRERA RSR
SHELBY COBRA 427SC
As you can see this server has the least cars to choose from. It is because it is hard to BOP this category.
A lot of skill is needed to tame these and drive them in the racing environment.
This is why this server is picked and mostly loved by the more experienced racers who prefer that extra challenge.