Don't worry, I'm not a newbi asking what exhasut to get. But the other day, I was just looking around my car, mainly checking for exhaust leaks since I added the Mac y-pipe system my self. No leaks, but I did find something that I thought was rather interesting. On the factory tube that is on the passenger side that goes from the header to the Y section (tube with the cats) there is this little rubber cylinder shaped thing connected to the pipe, it's just bolted on, no connection to the pipe, and its also not connected to the car. Anyone have any idea what this thing is for? It looks like it has absolutely no use because its just bolted on. Any ideas, please let me know.