i was told that 04 to 05 exhaust will fit on a 08zx10 but it has to be a certain one because they made two variants. One with flanges and screws and one without. Not sure which one will fit. Why am i asking this question? because the 04/05 are full ti and are a LOT LIGHTER than the stock exhaust on my 08, and i also believe that they are full exhaust too. Or at lease the cats were further down the line and easy to eliminate.