I had the same thing when I installed my Motoria exhaust and it went away after a couple of days. I didn't smell it inside the car really though. More after getting out after a long drive.

 

It's ussually the sealer they had at for ever gasket. When it the sealer is heated by the exhaust, the sealers has a real funky smell to it. It will go away in a couple of days once you've broken your exhaust in.

 

i know this is kind of off topic, but... i was wondering if you could put what it sounds like on here and some pics? i know some other people where wondering too. just had to ask

 

Check Rick's original post where he was selling it... was sound clips there already. tongue.gif

 

DUde, i would put money on it being your cat. When we put a new one on my dads truck, it got super red and smelled real bad. After driving for about an hour the red color went away along with the smell.