MY 2 cents? I think people slow down cars to run in different classes so they can go back to winning,! It used to be you started out slow, got better faster,more equipment on the car you moved up classes ,Now when most get there everyone see all those heavy hitters on there , with bigger faster cars, and have trouble competeing so they jump back a class or too , then start dominating the lower classes, then it comes to a reverse domino effect, to the point where even the kids in street can not compete because there are dominating cars in it instead of street cars.Pretty sad when you see three o more s-pro cars pro cars running in street and sportsman all in 1 night