Yeah i was toying with the idea of running a pre 05 sports cat and unequal headers as i know the centre section joins to either the old set up or the new. Was just wondering how much modification was needed to make them fit. My other idea was to try wrx headers and modify a flange for the n/a 2nd pipe where the uppipe flange is. If its just a case of extending a few pipes i may go the pre05 way as that seems easier. But as im sure you found out, in your head its easy in real life not so much lol