I have been keeping an eye on these on ebay, I know there is a few people running these, i know the ct9 ones are a "complete fail" but they do the td04 in mild steel and was wondering if they are ok ? i cant see the point in buying a hybrid ct9 when i believe you could possibly put a tdo4 kit together for around £600. So to anyone whos running one wether stainless or mild steel, 1. whats the fit like? good seal no blowing? i remember reading something about the decat pipe not fitting correctly with the lamda sensor 2. do they crack lol 3. anything else you can think of sorry for the essay and thanks