A few days ago i noticed my car was quieter... at first i thought it was just me, but the more i drive the more im damn sure its quieter... i cant figure out why. I have a 2.5" cat-back exhaust, im wandering if its the exhaust itself or if its something to do with the engine maybe... its weird, i notice a tiny dent in the exhaust about 2-3cm after the muffler before it goes over the diff, would this affect it that greatly??? any other ideas towards this problem are welcome

Maybe your cats blocked???

Cheers, Nathan

could very well be a blocked cat, have you noticed a decent lack of performance. generally if the internals of a muffler come a part theres quite a distinctive rattling noise.

well the day i noticed it i heard a clanging noise when i started my car up, like a peice of steel, or a wheel brace being dropped on the floor, but as i backed my car out of the garage i couldnt see anything noticable on the floor, i havent really noticed much of a decrease in performance but i havent really put my foot into it enough to tell...

Sounds like a baffle has come loose and is partially blocking the exhaust. Try some hard accelleration in 1st and see if it feels constipated and holds back