Well chaps, yesterday I finally found the cause of my long term boost loss issues! I was fitting my decat, and whilst I had the downpipe off, I thought I'd take a few pics inside the exhaust housing. visually looking in with a lead lamp these couldn't be seen, but looking on the pc later on told a different story Now, it's pretty clear that the circle on the left is a nice crack in the housing next to the wastegate, which is obviously going to be causing a sizeble loss of boost, but what about the right hand oval I've drawn? Is that some sort of casting mark, an unfortunate black line, or a monsterous crack? I think it's safe to say a new turbo is needed! Although how soon I'm just not sure. the car hasn't changed it's performance for over a year, so I can safely assume it's been like this a long time! I guess I'll have to join the long que of others on the lookout for a ko3s again This'll be my third!