They ( the pit inspectors) told me i had a loose muffler or some crap and i would have to replace the whole thing, turns out i just had to replace the resonator cause there were a few things loose inside it.

It took me many hours of calling up the pits to get an answer so i could book a time to see them but this was quite soon after all the cars were up for auction so they were really busy, i'm sure it wont be so bad now. All up it took me about 2 weeks to get plates put on mine

Also I don't think that you have to put it through a mechanical inspections test before taking it to the pits now, I had to do it for my car but it took ages so i think they just scraped that idea so all the cars could get through the system faster. It also saves you just about $400