Rear firewall

The biggest problem was Maple Grove wouldn't even let me go on the track not even do a slow test or anything with my car because I didn't have that firewall in the back that was Maple Grove here in Pennsylvania that's the closest track to me so they tell me if I got the firewall then I can run as fast as 10.00 but I don't even know what the car run or anything about it because they wouldn't even let me touch their track because of that