I posted friday about my car and how bad it sounded, and i thought that it was the cats or h pipe and others replied thats what they thought too. I just got back from the garage and the guy said he thought it was a gasket but when he got it on the lift he said that one of the bolts holding my h-pipe on had gotten loose and fallen off. He put another one on and tightened it up and its perfect now. I was so happy when the problem was just a bolt, instead of something bad/expensive. He didnt even charge me but i gave him some money anyway since i had been stressin about it all weekend....