Just had a y-pipe fitted to MY11 and am looking to see what other people have done with their MY11s. I have been in contact with the main guys on here who provide ecutek and cobb. I'm interested to hear what others have done and the reasons they have gone down a particular route. Not really interested in turning this into a who is better thread just want to get an opinion on what people have got done and were they concerned over warranty? Stage 4 or 650r conversions that sort of thing - thanks!