Not true, the dust shields will fit fine. I upgraded to the 4 pots and they use the same rotors as the WRX. The shields are just a little smaller is all. Look here for details:Dan00RS said:You'll also need to take the stamped steel dust shields off. The new rotor won't fit with those on.
I've got WRX brakes in the garage too! Hopefully I'll get the fronts installed this week, and see how that performs. The rear drum to disc upgrade will get done later. I'm not quite ready to see my new OBS interior torn up just yet.I actually have a set of complete WRX front brakes sitting in my garage waiting to go on. The rears should be going on when I get some free time later this semester.