I am think about buying an 07 wrx with 16k miles on it. The dealership just got it from auction so I went to go test drive it the other day they said that exhaust was cut and capped before the the cat. It was that way when i went to go test drive it and they are going to put the stock exhaust system on. The car felt great it shifted good. Would having the exhaust like that be harmful to the car in anyway?