should be a direct swap, but you may want to reuse your FXT trailing arms in lieu of the STi units.
Pretty sweet deal, I didn't think I would see many deals that were actually better than what I paid for my Ver.8 Brembo setup. For whatever reason I think the price is scaring people away, thinking it's too good to be true. In Canada we've got a lot of JDM part importers thanks to our lovely 15-year import rule, so the guys who are importing cars are finding they can pay the bills between car sales with a large number of JDM parts.
I could've saved myself another $50 if I had bought those instead of my setup, but mine came with Project Mu pads and calipers with better paint condition.