1 Pots To 2 Pots

[sti pretender]

Was thinking of changing the rear brakes on the Type R from 1 to 2 pots, car has the 290mm solid discs and I will have to change to vented but the question is will the 2 pot caliper fit direct onto the hub or will I need a fitting kit?

I know most of you will say upgrade to bigger but spent all my money on discs and pads for the newage and improving the handling on the R.

Thanks in advance

Robert