My apologies- I did not notice you DID NOT have a legacy turbo already.
Matt is correct that the downpipes will fit, but then you have to add a longer mid-pipe.
And both turbo legacy front/rears and WRX front/rears are better than what you have.
But, if you go wrx fronts you will have to go to 16 inch wheels.
the turbo brake setup only requires 15 inch wheels.
I am curious as to how you will be doing a diverter/blowoff valve
and am also curious what EM changes you will have as well as injectors.