There was no 10K....that's just TV money.
It didn't rain when they raced....that's just editing.
Watch the race again, especially the finish. There's not a drop of rain on the road or the double yellow lines in the middle of the road.
Also watch for Dave's car shaking the tires so bad that it shut the switch panel off which in turn shut the engine off....as Chief said on the show. None of that happened.
As is clearly said on the show....these are NOT street cars, they are RACE cars that are raced on the STREET. Tuff's car was towed back with a golf cart because the car doesn't have a radiator.
The production company, Pilgrim, gets permits from the towns to close the streets so they can have the races. They weren't going to show the Chicago episode because Dave lost. Tuff harassed them on Facebook and Youtube until they showed it....with editing that made him look bad, of course.