Seems like a strange, unpleasant smell (kind of like rotten eggs, but not as strong) is coming from my exhaust. I smelled it after about 45 minutes of 20-50mph driving in the city. It was more pronounced when I smelled the air right next to the muffler. The smell was there for maybe 10 seconds after I parked, and then it went away quickly. This started a day after I got my PowerTech muffler installed (2 days ago). The car has less than 5000 miles on it. I did some searches and people have said that it may be a blown cat. Is this possible with such a new car? Will the dealer fix it under warranty even with an aftermarker muffler (no other exhaust mods)? Any ideas? Thanks much.

Its a normal smell. Its just your exhaust breaking in.

I had the same smell...its gone now

Hmm, what needs to break in? Shiit, I hope it isn't anything like a cat going bad.. if it's the normal break in process of an exahsut, then it's all good. Bear in mind, however, that I only changed the muffler, nothing else.

yup, its normal

All new mufflers smell like @ss when you first get them and start the car. Mine went away after two days of driving.

I'll keep you guys updated if this doesn't go away. Thanks much for the help, as always