I think its just gonna be a full decat but if you chopped your resonator off and got to clamps either end on bolted it up to your decat pipe your sorted.Everyone slates these parts because its not a Harvey and scott pipe and its gonna leak and fall off a car and so on.Ive got a full decat fitted and it looks the same as when I bought it and does the business ;)
http://www.ebay.co.uk/itm/SUBARU-IMPREZA-BLOB-EYE-2-5-CENTRE-SECTION-STAINLESS-STEEL-DECAT-EXHAUST-PIPE-/220880930536?pt=UK_CarsParts_Vehicles_CarParts_SM&fits=Car+Make%3ASubaru&hash=item336d8786e8