Does anyone know if the rotors and calipers from a 2002 WRX will fit on a 1999 Legacy GT? I already have the stock 16's off a WRX, so rim clearance is not an issue. I have all the rotors and calipers at home, I was just wondering if it will be a huge headache to bolt them to the knuckle or not. Thanks.

Should bolt right up, you will need the caliper mounting bracket as well. The STI are different bolt patterns, but the WRX is 5x100

Thanks, I might try it out this weekend. I'll post my findings as I go. My brother's WRX is the donor car and if this works fine I am going to look into swapping some other parts. He has a set of Tein coilovers with EDFC that are starting to look really tempting.