I can't find the listing on ebay now, but, last year when I was looking for a new exhaust, I saw one by Free Flow systems at what seemed a great price. The thing that put me off was the wording in the advertisement. It was word for word (cut and paste?), the same description as the aftermarket can made by Beowulf which was selling for £210. In my mind, if you have gone through the trouble of designing and manufacturing something, why copy the description of a reputable brand? . . . It could well be a bargain, but as I say, it just put me off.