I'm thinking about sticking an Si muffler on my XRS. But what is the size on the Si muffler? Do you think this is a bad idea? Right now I have a magnaflow axelback on there and it sounds pretty good. But I was just wondering do you think it would sound good with an Si muffler on a Toyota? I would hope it would sound pretty much like an Si and not all raspy or *** or something.