I thought it was only mine too, but if you're talking about the rotten egg smell, it seems to be a characteristic of several of these cars. I don't know if it's because of the positioning of the cats or because there's twice as many as whats on a normal car. But alotta folks I've asked about this have the same issue.
I only smell mine when I'm into the throttle really hard or I've run the car very fast for a short while.